tests/cases/conformance/parser/ecmascript5/ClassDeclarations/parserClass1.ts(1,40): error TS2304: Cannot find name 'ILogger'.


==== tests/cases/conformance/parser/ecmascript5/ClassDeclarations/parserClass1.ts (1 errors) ====
        export class NullLogger implements ILogger {
                                           ~~~~~~~
!!! error TS2304: Cannot find name 'ILogger'.
            public information(): boolean { return false; }
            public debug(): boolean { return false; }
            public warning(): boolean { return false; }
            public error(): boolean { return false; }
            public fatal(): boolean { return false; }
            public log(s: string): void {
            }
        }