code: def _create_single_feature_method(feature):
      
      # Define the function properties.
      fx_name = feature.name.lower()
      if "detection" in fx_name:
          fx_doc = "Perform {0}.".format(fx_name.replace("_", " "))
      else:
          fx_doc = "Return {desc} information.".format(desc=fx_name.replace("_", " "))
  
      # Provide a complete docstring with argument and return value
      # information.
      fx_doc += """
  
      Args:
          image (:class:`~.{module}.types.Image`): The image to analyze.
          max_results (int):
              Number of results to return, does not apply for
              TEXT_DETECTION, DOCUMENT_TEXT_DETECTION, or CROP_HINTS.
          retry (int): Number of retries to do before giving up.
          timeout (int): Number of seconds before timing out.
          kwargs (dict): Additional properties to be set on the
              :class:`~.{module}.types.AnnotateImageRequest`.
  
      Returns:
          :class:`~.{module}.types.AnnotateImageResponse`: The API response.
      """
  
      # Get the actual feature value to send.
      feature_value = {"type": feature}
  
      # Define the function to be returned.
      def inner(self, image, max_results=None, retry=None, timeout=None, **kwargs):
          """Return a single feature annotation for the given image.
  
          Intended for use with functools.partial, to create the particular
          single-feature methods.
          """
          copied_features = feature_value.copy()
          if max_results is not None:
              copied_features["max_results"] = max_results
          request = dict(image=image, features=[copied_features], **kwargs)
          response = self.annotate_image(request, retry=retry, timeout=timeout)
          return response
  
      # Set the appropriate function metadata.
      inner.__name__ = fx_name
      inner.__doc__ = fx_doc
  
      # Return the final function.
      return inner
docs: Return a function that will detect a single feature.
  
      Args:
          feature (enum): A specific feature defined as a member of
              :class:`~enums.Feature.Type`.
  
      Returns:
          function: A helper function to detect just that feature.