protected void createDefaultEditPolicies() {
installEditPolicy(EditPolicyRoles.CREATION_ROLE,
new CreationEditPolicy());
super.createDefaultEditPolicies();
installEditPolicy(EditPolicyRoles.SEMANTIC_ROLE,
new ProcessingElementInstanceItemSemanticEditPolicy());
installEditPolicy(EditPolicy.LAYOUT_ROLE, createLayoutEditPolicy());
// XXX need an SCR to runtime to have another abstract superclass that would let children add reasonable editpolicies
// removeEditPolicy(org.eclipse.gmf.runtime.diagram.ui.editpolicies.EditPolicyRoles.CONNECTION_HANDLES_ROLE);
}