add.setParent((MusicContainerForm)getHost().getModel());
add.setChild(part);
add.setLabel(MusicMessages.MusicXYLayoutEditPolicy_AddCommandLabelText);
add.setDebugLabel("XYEP add subpart");//$NON-NLS-1$
SetConstraintCommand setConstraint = new SetConstraintCommand();
setConstraint.setLocation(rect);
setConstraint.setPart(part);
setConstraint.setLabel(MusicMessages.MusicXYLayoutEditPolicy_AddCommandLabelText);
setConstraint.setDebugLabel("XYEP setConstraint");//$NON-NLS-1$
Command cmd = add.chain(setConstraint);
return cmd;
}