class_docstr: Isotonic Regression
class_docstr_tok: ["Isotonic","Regression"]
docstr: Reference to custom evaluation function, format: `language:keyName=funcName`
  
  Type: ``str``.
docstr_tok: ["Reference","to","custom","evaluation","function",",","format",":","`","language",":","keyName=funcName","`","Type",":","``","str","``","."]
code: def custom_metric_func(self):
      """
      Reference to custom evaluation function, format: `language:keyName=funcName`
  
      Type: ``str``.
      """
      return self._parms.get("custom_metric_func")
  
imports: from h2o.estimators.estimator_base import H2OEstimator
  from h2o.exceptions import H2OValueError
  from h2o.frame import H2OFrame
  from h2o.utils.typechecks import assert_is_type, Enum, numeric
label_desc: Use image node_id 14 for calling the H2OIsotonicRegressionEstimator obj's underlying member method code with example usage: obj.custom_metric_func() and returns: self