tests/cases/compiler/unusedParametersInLambda1.ts(3,17): error TS6133: 'X' is declared but its value is never read.


==== tests/cases/compiler/unusedParametersInLambda1.ts (1 errors) ====
    class A {
        public f1() {
            return (X) => {
                    ~
!!! error TS6133: 'X' is declared but its value is never read.
            }
        }
    }