cppGetVertexLabelCoordinates

// COM1205 Propagation Pattern for DemDraw Project.
//
// Created by Tom Kneeland (tomk@ccs.neu.edu)
//
//   This propagation pattern traverses from VertexName to Coordinates, and
// returns the DemString stored in the coords data member of the Coordinates
// object.  The DemString represents the offset of the Vertex name's label
// as specified by tcl when the Vertex was created or last moved.
//
// Modification History:
// 
// 11/29/95 - Tom Kneeland (tomk@ccs.neu.edu)
//	Created.
//
*operation* DemString* cppGetVertexLabelCoordinates()
   *traverse*
	*from* VertexName
	*to*   Coordinates

   *wrapper* Coordinates
	(@
	   return_val = this->get_coords();
	 @)