title: how to pass data to Angular ng-bootstrap modal for binding
body: <p>Scenario:</p>
  <ul>
  <li>ChildComponent - having a lot ngModel binding elements.</li>
  </ul>
  <pre><code>&lt;input [(ngModel)]=&quot;TryToPassDataModel.name&quot;&gt;;
  </code></pre>
  <ul>
  <li>ParentComponent -</li>
  </ul>
  <pre><code>btn.onClick = function() {
    this.bsModalRef =
      this.modalService.open(ChildComponent, TryToPassDataModel);
  }
  </code></pre>
  <p>This works in ngx-bootstrap, but how to implement this in nb-bootstrap? (it looks like such a simple idea)</p>