class_docstr: Represents the distribution_constraints object of monitoring_config in constraints file.
docstr: Checks whether categorical_drift_method is valid or not.
docstr_tok: ["Checks","whether","categorical_drift_method","is","valid","or","not","."]
code: def valid_categorical_drift_method(categorical_drift_method):
      """Checks whether categorical_drift_method is valid or not."""
  
      if not categorical_drift_method:
          return True
  
      return categorical_drift_method in [
          CHI_SQUARED_METHOD,
          L_INFINITY_METHOD,
      ]
  
imports: from __future__ import print_function, absolute_import
label_desc: Use image node_id 3 for calling the DataQualityDistributionConstraints obj's underlying member method code with example usage: obj.valid_categorical_drift_method(categorical_drift_method) and returns: unknown, True