IMethod sibling= getLastMethod(getSuperType());
IMethod sibling= getLastMethod(getSuperType(new NullProgressMonitor()));
	private TextEdit createAddMemberEdit(String methodSource) throws JavaModelException {		int tabWidth=getTabWidth();		IMethod sibling= getLastMethod(getSuperType());		if (sibling != null)			return new MemberEdit(sibling, MemberEdit.INSERT_AFTER, new String[]{ methodSource}, tabWidth);		return			new MemberEdit(getSuperType(), MemberEdit.ADD_AT_END, new String[]{ methodSource}, tabWidth);	}