code: def init_data():
      data = linear_dataset(
          beta=10,
          num_common_causes=4,
          num_instruments=2,
          num_effect_modifiers=2,
          num_treatments=1,
          num_samples=1000,
          treatment_is_binary=True,
      )
  
      return data
  
file_path: dowhy/tests/causal_estimators/test_causalml_estimator.py
imports: import pytest
  from pytest import mark
  from dowhy import CausalModel
  from dowhy.datasets import linear_dataset
  from xgboost import XGBRegressor
label_desc: Use image node_id 1 for calling a global function with example usage: init_data() and returns: data