@cli.register_custom_action('<STR_LIT>', ('<STR_LIT>', ))<EOL><INDENT>@exc.on_http_error(exc.GitlabCreateError)<EOL>def create_fork_relation(self, forked_from_id, **kwargs):<DEDENT>
path = '<STR_LIT>' % (self.get_id(), forked_from_id)<EOL>self.manager.gitlab.http_post(path, **kwargs)<EOL>
Create a forked from/to relation between existing projects.

        Args:
            forked_from_id (int): The ID of the project that was forked from
            **kwargs: Extra options to send to the server (e.g. sudo)

        Raises:
            GitlabAuthenticationError: If authentication is not correct
            GitlabCreateError: If the relation could not be created