docs: def experiments_predictions_attachments_create(self, experiment_id, run_id, resource_id, filename, mime_type=None):
          """Attach a given data file with a model run. The attached file is
          identified by the resource identifier. If a resource with the given
          identifier already exists it will be overwritten.
  
          Parameters
          ----------
          experiment_id : string
              Unique experiment identifier
          model_id : string
              Unique identifier of model to run
          resource_id : string
              Unique attachment identifier
          filename : string
              Path to data file that is being attached. A copy of the file will
              be created
          mime_type : string, optional
              File Mime type
          Returns
          -------
          ModelRunHandle
              Modified model run handle or None if no run with given identifier
              exists
          """
          # Get experiment to ensure that it exists
          if self.experiments_get(experiment_id) is None:
              return None
          return self.predictions.create_data_file_attachment(
              run_id,
              resource_id,
              filename,
              mime_type=mime_type
          )