title: How to resolve 'Property 'foo' has no initializer and is not definitely assigned in the constructor' when using @Input decorator?
body: <p>How would I correctly initialize a property that has an <code>@Input</code> decorator without removing strict typing?</p>
  
  <p>Code below is what showing this warning</p>
  
  <pre><code>@Input
  foo: FormGroup;
  </code></pre>