docs: def get_resource_listing(url, offset, limit, properties):
      """Gneric method to retrieve a resource listing from a SCO-API. Takes the
      resource-specific API listing Url as argument.
  
      Parameters
      ----------
      url : string
          Resource listing Url for a SCO-API
      offset : int, optional
          Starting offset for returned list items
      limit : int, optional
          Limit the number of items in the result
      properties : List(string)
          List of additional object properties to be included for items in
          the result
  
      Returns
      -------
      List(ResourceHandle)
          List of resource handle (one per subject in the object listing)
      """
      # Create listing query based on given arguments
      query = [
          QPARA_OFFSET + '=' + str(offset),
          QPARA_LIMIT + '=' + str(limit)
      ]
      # Add properties argument if property list is not None and not empty
      if not properties is None:
          if len(properties) > 0:
              query.append(QPARA_ATTRIBUTES + '=' + ','.join(properties))
      # Add query to Url.
      url = url + '?' + '&'.join(query)
      # Get subject listing Url for given SCO-API and decorate it with
      # given listing arguments. Then retrieve listing from SCO-API.
      json_obj = JsonResource(url).json
      # Convert result into a list of resource handles and return the result
      resources = []
      for element in json_obj['items']:
          resource = ResourceHandle(element)
          # Add additional properties to resource if list is given
          if not properties is None:
              resource.properties = {}
              for prop in properties:
                  if prop in element:
                      resource.properties[prop] = element[prop]
          resources.append(resource)
      return resources