=== tests/cases/compiler/genericSignatureInheritance.ts ===
interface I {
>I : Symbol(I, Decl(genericSignatureInheritance.ts, 0, 0))

    <T>(x: T): string;
>T : Symbol(T, Decl(genericSignatureInheritance.ts, 1, 5))
>x : Symbol(x, Decl(genericSignatureInheritance.ts, 1, 8))
>T : Symbol(T, Decl(genericSignatureInheritance.ts, 1, 5))
}

interface I2 extends I { }
>I2 : Symbol(I2, Decl(genericSignatureInheritance.ts, 2, 1))
>I : Symbol(I, Decl(genericSignatureInheritance.ts, 0, 0))