tests/cases/compiler/unusedVariablesinNamespaces1.ts(3,11): error TS6133: 'lettersRegexp' is declared but never used.


==== tests/cases/compiler/unusedVariablesinNamespaces1.ts (1 errors) ====
    
    namespace Validation {
        const lettersRegexp = /^[A-Za-z]+$/;
              ~~~~~~~~~~~~~
!!! error TS6133: 'lettersRegexp' is declared but never used.
    }