code: def _str_items_custom(self):
      return [
          "Sum of Squared Error (Numeric): {}".format(self.num_err()),
          "Misclassification Error (Categorical): {}".format(
              self.cat_err()
          ),
      ]
  
imports: from h2o.model import MetricsBase
label_desc: Use image node_id 1 for calling the H2ODimReductionModelMetrics obj's underlying member method code with example usage: obj._str_items_custom() and returns: list