docstr: Return model fields related to training metric
  Fields SHOULD be wrapped by _precomputed_field, if necessary
docstr_tok: ["Return","model","fields","related","to","training","metric","Fields","SHOULD","be","wrapped","by","_precomputed_field",",","if","necessary"]
code: def _metric_fields(self):
      """
      Return model fields related to training metric
      Fields SHOULD be wrapped by _precomputed_field, if necessary
      """
      return {"training time (secs)": "training_time"}
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import turicreate
  from turicreate.toolkits._model import CustomModel
  from prettytable import PrettyTable
  from turicreate.toolkits._internal_utils import _precomputed_field, _toolkit_repr_print
  import six
label_desc: Use image node_id 11 for calling the GraphAnalyticsModel obj's underlying member method code with example usage: obj._metric_fields() and returns: dict