TypeScript/tests/baselines/reference/missingReturnStatement1.errors.txt

==== tests/cases/compiler/missingReturnStatement1.ts (1 errors) ====
    class Foo {
        foo(): number {
               ~~~~~~
!!! A function whose declared type is neither 'void' nor 'any' must return a value or consist of a single 'throw' statement.
            //return 4;
        }
    }