Assert.isTrue(!pack.isReadOnly(), RefactoringCoreMessages.getString("RenamePackageChange.assert.read_only"));
Assert.isTrue(!pack.isReadOnly(), "package must not be read only");
	public RenamePackageChange(IPackageFragment pack, String newName) throws JavaModelException{		this(pack.getPath(), pack.getElementName(), newName);		Assert.isTrue(!pack.isReadOnly(), RefactoringCoreMessages.getString("RenamePackageChange.assert.read_only")); //$NON-NLS-1$	}