TypeScript/tests/baselines/reference/assignmentCompatWithCallSignatures6.types

=== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures6.ts ===
// checking assignment compatibility relations for function types. All valid

class Base { foo: string; }
>Base : Base, Symbol(Base, Decl(assignmentCompatWithCallSignatures6.ts, 0, 0))
>foo : string, Symbol(foo, Decl(assignmentCompatWithCallSignatures6.ts, 2, 12))

class Derived extends Base { bar: string; }
>Derived : Derived, Symbol(Derived, Decl(assignmentCompatWithCallSignatures6.ts, 2, 27))
>Base : Base, Symbol(Base, Decl(assignmentCompatWithCallSignatures6.ts, 0, 0))
>bar : string, Symbol(bar, Decl(assignmentCompatWithCallSignatures6.ts, 3, 28))

class Derived2 extends Derived { baz: string; }
>Derived2 : Derived2, Symbol(Derived2, Decl(assignmentCompatWithCallSignatures6.ts, 3, 43))
>Derived : Derived, Symbol(Derived, Decl(assignmentCompatWithCallSignatures6.ts, 2, 27))
>baz : string, Symbol(baz, Decl(assignmentCompatWithCallSignatures6.ts, 4, 32))

class OtherDerived extends Base { bing: string; }
>OtherDerived : OtherDerived, Symbol(OtherDerived, Decl(assignmentCompatWithCallSignatures6.ts, 4, 47))
>Base : Base, Symbol(Base, Decl(assignmentCompatWithCallSignatures6.ts, 0, 0))
>bing : string, Symbol(bing, Decl(assignmentCompatWithCallSignatures6.ts, 5, 33))

interface A {
>A : A, Symbol(A, Decl(assignmentCompatWithCallSignatures6.ts, 5, 49))

    a: <T>(x: T) => T[];
>a : <T>(x: T) => T[], Symbol(a, Decl(assignmentCompatWithCallSignatures6.ts, 7, 13))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 8, 8))
>x : T, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 8, 11))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 8, 8))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 8, 8))

    a2: <T>(x: T) => string[];
>a2 : <T>(x: T) => string[], Symbol(a2, Decl(assignmentCompatWithCallSignatures6.ts, 8, 24))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 9, 9))
>x : T, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 9, 12))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 9, 9))

    a3: <T>(x: T) => void;
>a3 : <T>(x: T) => void, Symbol(a3, Decl(assignmentCompatWithCallSignatures6.ts, 9, 30))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 10, 9))
>x : T, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 10, 12))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 10, 9))

    a4: <T,U>(x: T, y: U) => string;
>a4 : <T, U>(x: T, y: U) => string, Symbol(a4, Decl(assignmentCompatWithCallSignatures6.ts, 10, 26))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 11, 9))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 11, 11))
>x : T, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 11, 14))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 11, 9))
>y : U, Symbol(y, Decl(assignmentCompatWithCallSignatures6.ts, 11, 19))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 11, 11))

    a5: <T,U>(x: (arg: T) => U) => T;
>a5 : <T, U>(x: (arg: T) => U) => T, Symbol(a5, Decl(assignmentCompatWithCallSignatures6.ts, 11, 36))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 12, 9))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 12, 11))
>x : (arg: T) => U, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 12, 14))
>arg : T, Symbol(arg, Decl(assignmentCompatWithCallSignatures6.ts, 12, 18))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 12, 9))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 12, 11))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 12, 9))

    a6: <T extends Base>(x: (arg: T) => Derived) => T;
>a6 : <T extends Base>(x: (arg: T) => Derived) => T, Symbol(a6, Decl(assignmentCompatWithCallSignatures6.ts, 12, 37))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 13, 9))
>Base : Base, Symbol(Base, Decl(assignmentCompatWithCallSignatures6.ts, 0, 0))
>x : (arg: T) => Derived, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 13, 25))
>arg : T, Symbol(arg, Decl(assignmentCompatWithCallSignatures6.ts, 13, 29))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 13, 9))
>Derived : Derived, Symbol(Derived, Decl(assignmentCompatWithCallSignatures6.ts, 2, 27))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 13, 9))

    a11: <T>(x: { foo: T }, y: { foo: T; bar: T }) => Base;
>a11 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base, Symbol(a11, Decl(assignmentCompatWithCallSignatures6.ts, 13, 54))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 14, 10))
>x : { foo: T; }, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 14, 13))
>foo : T, Symbol(foo, Decl(assignmentCompatWithCallSignatures6.ts, 14, 17))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 14, 10))
>y : { foo: T; bar: T; }, Symbol(y, Decl(assignmentCompatWithCallSignatures6.ts, 14, 27))
>foo : T, Symbol(foo, Decl(assignmentCompatWithCallSignatures6.ts, 14, 32))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 14, 10))
>bar : T, Symbol(bar, Decl(assignmentCompatWithCallSignatures6.ts, 14, 40))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 14, 10))
>Base : Base, Symbol(Base, Decl(assignmentCompatWithCallSignatures6.ts, 0, 0))

    a15: <T>(x: { a: T; b: T }) => T[];
>a15 : <T>(x: { a: T; b: T; }) => T[], Symbol(a15, Decl(assignmentCompatWithCallSignatures6.ts, 14, 59))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 15, 10))
>x : { a: T; b: T; }, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 15, 13))
>a : T, Symbol(a, Decl(assignmentCompatWithCallSignatures6.ts, 15, 17))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 15, 10))
>b : T, Symbol(b, Decl(assignmentCompatWithCallSignatures6.ts, 15, 23))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 15, 10))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 15, 10))

    a16: <T extends Base>(x: { a: T; b: T }) => T[];
>a16 : <T extends Base>(x: { a: T; b: T; }) => T[], Symbol(a16, Decl(assignmentCompatWithCallSignatures6.ts, 15, 39))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 16, 10))
>Base : Base, Symbol(Base, Decl(assignmentCompatWithCallSignatures6.ts, 0, 0))
>x : { a: T; b: T; }, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 16, 26))
>a : T, Symbol(a, Decl(assignmentCompatWithCallSignatures6.ts, 16, 30))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 16, 10))
>b : T, Symbol(b, Decl(assignmentCompatWithCallSignatures6.ts, 16, 36))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 16, 10))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 16, 10))
}

var x: A;
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>A : A, Symbol(A, Decl(assignmentCompatWithCallSignatures6.ts, 5, 49))

var b: <T>(x: T) => T[]; 
>b : <T>(x: T) => T[], Symbol(b, Decl(assignmentCompatWithCallSignatures6.ts, 21, 3))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 21, 8))
>x : T, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 21, 11))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 21, 8))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 21, 8))

x.a = b;
>x.a = b : <T>(x: T) => T[]
>x.a : <T>(x: T) => T[], Symbol(A.a, Decl(assignmentCompatWithCallSignatures6.ts, 7, 13))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a : <T>(x: T) => T[], Symbol(A.a, Decl(assignmentCompatWithCallSignatures6.ts, 7, 13))
>b : <T>(x: T) => T[], Symbol(b, Decl(assignmentCompatWithCallSignatures6.ts, 21, 3))

b = x.a;
>b = x.a : <T>(x: T) => T[]
>b : <T>(x: T) => T[], Symbol(b, Decl(assignmentCompatWithCallSignatures6.ts, 21, 3))
>x.a : <T>(x: T) => T[], Symbol(A.a, Decl(assignmentCompatWithCallSignatures6.ts, 7, 13))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a : <T>(x: T) => T[], Symbol(A.a, Decl(assignmentCompatWithCallSignatures6.ts, 7, 13))

var b2: <T>(x: T) => string[]; 
>b2 : <T>(x: T) => string[], Symbol(b2, Decl(assignmentCompatWithCallSignatures6.ts, 24, 3))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 24, 9))
>x : T, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 24, 12))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 24, 9))

x.a2 = b2;
>x.a2 = b2 : <T>(x: T) => string[]
>x.a2 : <T>(x: T) => string[], Symbol(A.a2, Decl(assignmentCompatWithCallSignatures6.ts, 8, 24))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a2 : <T>(x: T) => string[], Symbol(A.a2, Decl(assignmentCompatWithCallSignatures6.ts, 8, 24))
>b2 : <T>(x: T) => string[], Symbol(b2, Decl(assignmentCompatWithCallSignatures6.ts, 24, 3))

b2 = x.a2;
>b2 = x.a2 : <T>(x: T) => string[]
>b2 : <T>(x: T) => string[], Symbol(b2, Decl(assignmentCompatWithCallSignatures6.ts, 24, 3))
>x.a2 : <T>(x: T) => string[], Symbol(A.a2, Decl(assignmentCompatWithCallSignatures6.ts, 8, 24))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a2 : <T>(x: T) => string[], Symbol(A.a2, Decl(assignmentCompatWithCallSignatures6.ts, 8, 24))

var b3: <T>(x: T) => T;
>b3 : <T>(x: T) => T, Symbol(b3, Decl(assignmentCompatWithCallSignatures6.ts, 27, 3))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 27, 9))
>x : T, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 27, 12))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 27, 9))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 27, 9))

x.a3 = b3;
>x.a3 = b3 : <T>(x: T) => T
>x.a3 : <T>(x: T) => void, Symbol(A.a3, Decl(assignmentCompatWithCallSignatures6.ts, 9, 30))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a3 : <T>(x: T) => void, Symbol(A.a3, Decl(assignmentCompatWithCallSignatures6.ts, 9, 30))
>b3 : <T>(x: T) => T, Symbol(b3, Decl(assignmentCompatWithCallSignatures6.ts, 27, 3))

b3 = x.a3;
>b3 = x.a3 : <T>(x: T) => void
>b3 : <T>(x: T) => T, Symbol(b3, Decl(assignmentCompatWithCallSignatures6.ts, 27, 3))
>x.a3 : <T>(x: T) => void, Symbol(A.a3, Decl(assignmentCompatWithCallSignatures6.ts, 9, 30))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a3 : <T>(x: T) => void, Symbol(A.a3, Decl(assignmentCompatWithCallSignatures6.ts, 9, 30))

var b4: <T, U>(x: T, y: U) => string; 
>b4 : <T, U>(x: T, y: U) => string, Symbol(b4, Decl(assignmentCompatWithCallSignatures6.ts, 30, 3))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 30, 9))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 30, 11))
>x : T, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 30, 15))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 30, 9))
>y : U, Symbol(y, Decl(assignmentCompatWithCallSignatures6.ts, 30, 20))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 30, 11))

x.a4 = b4;
>x.a4 = b4 : <T, U>(x: T, y: U) => string
>x.a4 : <T, U>(x: T, y: U) => string, Symbol(A.a4, Decl(assignmentCompatWithCallSignatures6.ts, 10, 26))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a4 : <T, U>(x: T, y: U) => string, Symbol(A.a4, Decl(assignmentCompatWithCallSignatures6.ts, 10, 26))
>b4 : <T, U>(x: T, y: U) => string, Symbol(b4, Decl(assignmentCompatWithCallSignatures6.ts, 30, 3))

b4 = x.a4;
>b4 = x.a4 : <T, U>(x: T, y: U) => string
>b4 : <T, U>(x: T, y: U) => string, Symbol(b4, Decl(assignmentCompatWithCallSignatures6.ts, 30, 3))
>x.a4 : <T, U>(x: T, y: U) => string, Symbol(A.a4, Decl(assignmentCompatWithCallSignatures6.ts, 10, 26))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a4 : <T, U>(x: T, y: U) => string, Symbol(A.a4, Decl(assignmentCompatWithCallSignatures6.ts, 10, 26))

var b5: <T, U>(x: (arg: T) => U) => T; 
>b5 : <T, U>(x: (arg: T) => U) => T, Symbol(b5, Decl(assignmentCompatWithCallSignatures6.ts, 33, 3))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 33, 9))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 33, 11))
>x : (arg: T) => U, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 33, 15))
>arg : T, Symbol(arg, Decl(assignmentCompatWithCallSignatures6.ts, 33, 19))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 33, 9))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 33, 11))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 33, 9))

x.a5 = b5;
>x.a5 = b5 : <T, U>(x: (arg: T) => U) => T
>x.a5 : <T, U>(x: (arg: T) => U) => T, Symbol(A.a5, Decl(assignmentCompatWithCallSignatures6.ts, 11, 36))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a5 : <T, U>(x: (arg: T) => U) => T, Symbol(A.a5, Decl(assignmentCompatWithCallSignatures6.ts, 11, 36))
>b5 : <T, U>(x: (arg: T) => U) => T, Symbol(b5, Decl(assignmentCompatWithCallSignatures6.ts, 33, 3))

b5 = x.a5;
>b5 = x.a5 : <T, U>(x: (arg: T) => U) => T
>b5 : <T, U>(x: (arg: T) => U) => T, Symbol(b5, Decl(assignmentCompatWithCallSignatures6.ts, 33, 3))
>x.a5 : <T, U>(x: (arg: T) => U) => T, Symbol(A.a5, Decl(assignmentCompatWithCallSignatures6.ts, 11, 36))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a5 : <T, U>(x: (arg: T) => U) => T, Symbol(A.a5, Decl(assignmentCompatWithCallSignatures6.ts, 11, 36))

var b11: <T, U>(x: { foo: T }, y: { foo: U; bar: U }) => Base; 
>b11 : <T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base, Symbol(b11, Decl(assignmentCompatWithCallSignatures6.ts, 36, 3))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 36, 10))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 36, 12))
>x : { foo: T; }, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 36, 16))
>foo : T, Symbol(foo, Decl(assignmentCompatWithCallSignatures6.ts, 36, 20))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 36, 10))
>y : { foo: U; bar: U; }, Symbol(y, Decl(assignmentCompatWithCallSignatures6.ts, 36, 30))
>foo : U, Symbol(foo, Decl(assignmentCompatWithCallSignatures6.ts, 36, 35))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 36, 12))
>bar : U, Symbol(bar, Decl(assignmentCompatWithCallSignatures6.ts, 36, 43))
>U : U, Symbol(U, Decl(assignmentCompatWithCallSignatures6.ts, 36, 12))
>Base : Base, Symbol(Base, Decl(assignmentCompatWithCallSignatures6.ts, 0, 0))

x.a11 = b11;
>x.a11 = b11 : <T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base
>x.a11 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base, Symbol(A.a11, Decl(assignmentCompatWithCallSignatures6.ts, 13, 54))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a11 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base, Symbol(A.a11, Decl(assignmentCompatWithCallSignatures6.ts, 13, 54))
>b11 : <T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base, Symbol(b11, Decl(assignmentCompatWithCallSignatures6.ts, 36, 3))

b11 = x.a11;
>b11 = x.a11 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base
>b11 : <T, U>(x: { foo: T; }, y: { foo: U; bar: U; }) => Base, Symbol(b11, Decl(assignmentCompatWithCallSignatures6.ts, 36, 3))
>x.a11 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base, Symbol(A.a11, Decl(assignmentCompatWithCallSignatures6.ts, 13, 54))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a11 : <T>(x: { foo: T; }, y: { foo: T; bar: T; }) => Base, Symbol(A.a11, Decl(assignmentCompatWithCallSignatures6.ts, 13, 54))

var b16: <T>(x: { a: T; b: T }) => T[]; 
>b16 : <T>(x: { a: T; b: T; }) => T[], Symbol(b16, Decl(assignmentCompatWithCallSignatures6.ts, 39, 3))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 39, 10))
>x : { a: T; b: T; }, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 39, 13))
>a : T, Symbol(a, Decl(assignmentCompatWithCallSignatures6.ts, 39, 17))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 39, 10))
>b : T, Symbol(b, Decl(assignmentCompatWithCallSignatures6.ts, 39, 23))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 39, 10))
>T : T, Symbol(T, Decl(assignmentCompatWithCallSignatures6.ts, 39, 10))

x.a16 = b16;
>x.a16 = b16 : <T>(x: { a: T; b: T; }) => T[]
>x.a16 : <T extends Base>(x: { a: T; b: T; }) => T[], Symbol(A.a16, Decl(assignmentCompatWithCallSignatures6.ts, 15, 39))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a16 : <T extends Base>(x: { a: T; b: T; }) => T[], Symbol(A.a16, Decl(assignmentCompatWithCallSignatures6.ts, 15, 39))
>b16 : <T>(x: { a: T; b: T; }) => T[], Symbol(b16, Decl(assignmentCompatWithCallSignatures6.ts, 39, 3))

b16 = x.a16;
>b16 = x.a16 : <T extends Base>(x: { a: T; b: T; }) => T[]
>b16 : <T>(x: { a: T; b: T; }) => T[], Symbol(b16, Decl(assignmentCompatWithCallSignatures6.ts, 39, 3))
>x.a16 : <T extends Base>(x: { a: T; b: T; }) => T[], Symbol(A.a16, Decl(assignmentCompatWithCallSignatures6.ts, 15, 39))
>x : A, Symbol(x, Decl(assignmentCompatWithCallSignatures6.ts, 19, 3))
>a16 : <T extends Base>(x: { a: T; b: T; }) => T[], Symbol(A.a16, Decl(assignmentCompatWithCallSignatures6.ts, 15, 39))