code: def _evaluate_cdf(self, y, x_z):
      return self.conditional_density.cdf(
          endog_predict=[y], exog_predict=x_z
      )
  
file_path: dowhy/dowhy/do_samplers/kernel_density_sampler.py
imports: import numpy
  from scipy.interpolate import interp1d
  from statsmodels.nonparametric.kernel_density import EstimatorSettings, KDEMultivariateConditional
  from dowhy.do_sampler import DoSampler
label_desc: Use image node_id 3 for calling the KernelSampler obj's underlying member method code with example usage: obj._evaluate_cdf(y, x_z) and returns: self