unusedClassesinNamespace5.ts(10,11): error TS6196: 'c3' is declared but never used.
unusedClassesinNamespace5.ts(11,16): error TS2564: Property 'x' has no initializer and is not definitely assigned in the constructor.


==== unusedClassesinNamespace5.ts (2 errors) ====
    namespace Validation {
        class c1 {
    
        }
    
        export class c2 {
    
        }
    
        class c3 {
              ~~
!!! error TS6196: 'c3' is declared but never used.
            public x: c1;
                   ~
!!! error TS2564: Property 'x' has no initializer and is not definitely assigned in the constructor.
        }
    }