tests/cases/compiler/inheritanceMemberPropertyOverridingMethod.ts(8,5): error TS2424: Class 'a' defines instance member function 'x', but extended class 'b' defines it as instance member property.
==== tests/cases/compiler/inheritanceMemberPropertyOverridingMethod.ts (1 errors) ====
class a {
x() {
return "20";
}
class b extends a {
x: () => string;
~
!!! error TS2424: Class 'a' defines instance member function 'x', but extended class 'b' defines it as instance member property.