code: def get_merged_env(self, include_os=False):
          
          env = {}
          if include_os:
              env.update(os.environ.copy())
          for level in range(3):
              env.update(self.pipeline.data.env_list[level].copy())
          return env
docs: Copying and merging environment variables.
  
          Args:
              include_os (bool): when true then include the environment variables (default: False)
  
          Returns:
              dict: environment variables as defined in the pipeline
                    (optional including system environment variables).