swc/crates/swc_ecma_parser/tests/tsc/parserClass1.ts

    export class NullLogger implements 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 {
        }
    }