TypeScript/tests/baselines/reference/ClassDeclaration25.errors.txt

==== tests/cases/compiler/ClassDeclaration25.ts (2 errors) ====
    interface IList<T> {
        data(): T;
        next(): string;
    }
    class List<U> implements IList<U> {
        data(): U;
        ~~~~
!!! Function implementation is missing.
        next(): string;
        ~~~~
!!! Function implementation is missing.
    }