code: func (c *DOM) GetDocument(depth int, pierce bool) (*DOMNode, error) {
  	var v DOMGetDocumentParams
  	v.Depth = depth
  	v.Pierce = pierce
  	return c.GetDocumentWithParams(&v)
  }
docs: // GetDocument - Returns the root DOM node (and optionally the subtree) to the caller.
  // depth - The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the entire subtree or provide an integer larger than 0.
  // pierce - Whether or not iframes and shadow roots should be traversed when returning the subtree (default is false).
  // Returns -  root - Resulting node.