def set_copyright(self, copyright_=None):
pass<EOL>
Sets the copyright.

        arg:    copyright (string): the new copyright
        raise:  InvalidArgument - ``copyright`` is invalid
        raise:  NoAccess - ``Metadata.isReadOnly()`` is ``true``
        raise:  NullArgument - ``copyright`` is ``null``
        *compliance: mandatory -- This method must be implemented.*