Transfer a project to this group.

        Args:
            to_project_id (int): ID of the project to transfer
            **kwargs: Extra options to send to the server (e.g. sudo)

        Raises:
            GitlabAuthenticationError: If authentication is not correct
            GitlabTransferProjectError: If the project could not be transfered

def transfer_project(self, to_project_id, **kwargs):
        """Transfer a project to this group.

        Args:
            to_project_id (int): ID of the project to transfer
            **kwargs: Extra options to send to the server (e.g. sudo)

        Raises:
            GitlabAuthenticationError: If authentication is not correct
            GitlabTransferProjectError: If the project could not be transfered
        """
        path = '/groups/%s/projects/%s' % (self.id, to_project_id)
        self.manager.gitlab.http_post(path, **kwargs)