class_docstr: Main class for storing the causal model state.
code: def get_effect_modifiers(self):
      self._effect_modifiers = self._graph.get_effect_modifiers(
          self._treatment, self._outcome
      )
      return self._effect_modifiers
  
imports: import logging
  import typing
  import warnings
  from itertools import combinations
  from sympy import init_printing
  import dowhy.causal_estimators
  import dowhy.causal_refuters
  import dowhy.graph_learners
  from dowhy.causal_estimator import CausalEstimate, estimate_effect
  from dowhy.causal_graph import CausalGraph
  from dowhy.causal_identifier import AutoIdentifier, BackdoorAdjustment, IDIdentifier
  from dowhy.causal_identifier.identify_effect import EstimandType
  from dowhy.causal_refuters.graph_refuter import GraphRefuter
  from dowhy.utils.api import parse_state
label_desc: Use image node_id 6 for calling the CausalModel obj's underlying member method code with example usage: obj.get_effect_modifiers() and returns: self