title: extend a angular component with ng-template
body: <p>I am using Kendo Ui as my favorite Ui Framework for Angular.</p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;kendo-multiselect [data]="listItems" [(ngModel)]="value"&gt;
         &lt;ng-template kendoMultiSelectHeaderTemplate let-dataItem&gt;
              &lt;strong (click)="toggleSelection()"&gt;Alle Auswählen&lt;/strong&gt;
           &lt;/ng-template&gt;
  &lt;/kendo-multiselect&gt;
  </code></pre>
  
  <p>So far so good, but I need the ng-template an more in nearly every of my multiselect dropdownlists. So my question is, can I create a directive which I can use directly on the host komponent which creates me the ng-template and all the other stuff I need or what is here the best solution to extend a existing component subtemplate.</p>
  
  <p>example result:</p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;kendo-multiselect my-multiselectHeader 
                     [data]="listItems" 
                     [(ngModel)]="value"&gt;
  &lt;/kendo-multiselect&gt;
  </code></pre>