docs: def new_dataset(self, *args, **kwargs):
          """ Creates a new dataset
  
          :param args: Positional args passed to the Dataset constructor.
          :param kwargs:  Keyword args passed to the Dataset constructor.
          :return: :class:`ambry.orm.Dataset`
          :raises: :class:`ambry.orm.ConflictError` if the a Dataset records already exists with the given vid
          """
  
          ds = Dataset(*args, **kwargs)
  
          try:
              self.session.add(ds)
              self.session.commit()
              ds._database = self
              return ds
          except IntegrityError as e:
              self.session.rollback()
              raise ConflictError(
                  "Can't create dataset '{}'; one probably already exists: {} ".format(str(ds), e))