def remove_permissions(self, value, role='any'):
        """Remove permissions from a user or domain.

        :param value: User or domain to remove permissions from
        :type value: str
        :param role: (optional) Permission to remove. Defaults to all
                     permissions.
        :type role: str

        Example::

            # Remove Otto's write permission for this spreadsheet
            sh.remove_permissions('otto@example.com', role='writer')

            # Remove all Otto's permissions for this spreadsheet
            sh.remove_permissions('otto@example.com')
        """
        permission_list = self.client.list_permissions(self.id)

        key = 'emailAddress' if '@' in value else 'domain'

        filtered_id_list = [
            p['id'] for p in permission_list
            if p[key] == value and (p['role'] == role or role == 'any')
        ]

        for permission_id in filtered_id_list:
            self.client.remove_permission(self.id, permission_id)

        return filtered_id_list