code: def create_seq(self, project):
          
          dialog = SequenceCreatorDialog(project=project, parent=self)
          dialog.exec_()
          seq = dialog.sequence
          return seq
docs: Create and return a new sequence
  
          :param project: the project for the sequence
          :type deps: :class:`jukeboxcore.djadapter.models.Project`
          :returns: The created sequence or None
          :rtype: None | :class:`jukeboxcore.djadapter.models.Sequence`
          :raises: None