index.ts(4,5): error TS2564: Property '_ref' has no initializer and is not definitely assigned in the constructor.


==== deps.ts (0 errors) ====
    export function Input(): any { }
    export class TemplateRef { }
    
==== index.ts (1 errors) ====
    import { Input, TemplateRef } from './deps';
    
    export class MyComponent {
        _ref: TemplateRef;
        ~~~~
!!! error TS2564: Property '_ref' has no initializer and is not definitely assigned in the constructor.
    
        @Input()
        get ref() { return this._ref; }
        set ref(value: TemplateRef) { this._ref = value; }
    }
    