code: public List<ManagementGroupVertex> getSuccessors() {
  
  		final List<ManagementGroupVertex> successors = new ArrayList<ManagementGroupVertex>();
  
  		for (ManagementGroupEdge edge : this.forwardEdges) {
  			successors.add(edge.getTarget());
  		}
  
  		return successors;
  	}
docs: Returns the list of successors of this group vertex. A successor is a group vertex which can be reached via a
  group edge originating at this group vertex.
  
  @return the list of successors of this group vertex.