protected void createDefaultEditPolicies() {
super.createDefaultEditPolicies();
installEditPolicy(EditPolicyRoles.SEMANTIC_ROLE,
new PackageItemSemanticEditPolicy());
installEditPolicy(EditPolicyRoles.CANONICAL_ROLE,
new PackageCanonicalEditPolicy());
// removeEditPolicy(org.eclipse.gmf.runtime.diagram.ui.editpolicies.EditPolicyRoles.POPUPBAR_ROLE);
}