@classmethod
def new(cls, content: dict=None, command: str=None, group: str=None, member:
    str=None, members: list=None):
    """
        Create group command

        :param content: command info
        :param command: command name
        :param group:   group ID
        :param member:  member list
        :param members: member ID
        :return: GroupCommand object
        """
    if content is None:
        content = {}
    if group is not None:
        content['group'] = group
    if members is not None:
        content['members'] = members
    elif member is not None:
        content['member'] = member
    return super().new(content=content, command=command)
