code: def _make_environment(self, inputs, outputs, mounts):
      
      env = {}
      env.update(providers_util.get_file_environment_variables(inputs))
      env.update(providers_util.get_file_environment_variables(outputs))
      env.update(providers_util.get_file_environment_variables(mounts))
      return env
docs: Return a dictionary of environment variables for the container.