public void DeleteElements( 
   Func<Element,bool> predicate
)

//Delete multiple layout elements.

//Perform on the worker thread
await QueuedTask.Run(() =>
{
  layout.DeleteElements(item => item.Name.Contains("Clone"));
});

//on the QueuedTask  
var elementsToRemove = layout.GetSelectedElements();
layout.DeleteElements(elementsToRemove);

//Delete an element or elements on a layout.

//Perform on the worker thread
QueuedTask.Run(() =>
{
  //Delete a specific element on a layout
  aLayout.DeleteElement(elm);
 
  //Or delete a group of elements using a filter
  aLayout.DeleteElements(item => item.Name.Contains("Clone"));

  //Or delete all elements on a layout
  aLayout.DeleteElements(item => true);
});