title: How to fetch diagram object of EA.Element
body: <p>I have EA element. How can I get the Diagram object or Diagram id for the element's parent?
  I am creating EA element through a tabular form. I want to programmatically add this element to the Diagram of parent element.
  Parent element is already added to the diagram.</p>
  
  <p>How can I get that parent diagram ? </p>