title: angular primeng datatable get filtered data
body: <p>I want to get all the filter data from table, suppose i have </p>
  
  <pre><code>&lt;p-dataTable #dt [value]="list" selectionMode="multiple" [(selection)]="selection"  [rows]="2"[paginator]="true" &gt;
         &lt;p-column selectionMode="multiple"&gt;&lt;/p-column&gt;
         &lt;p-column field="description" header="description" [filter]="true"&gt;&lt;/p-column&gt;
  </code></pre>
  
  <p>now once i do filter the rows, and do a select all, i want to select all the rows which are filter, only only in that particular page, but across all pagination.</p>
  
  <p>I have tried, this.dt.dataToRender, but it only provides data that is filtered but its only limited to that particular page.</p>