@classmethod
def new(cls, content: dict=None, block: list=None):
    """
        Create block command

        :param content: command info
        :param block: block-list
        :return: BlockCommand object
        """
    if content is None:
        content = {}
    if block is not None:
        content['list'] = block
    return super().new(content=content, command=cls.BLOCK)
