code: def crs_text_element(crs, feature, parent):
      
      _ = feature, parent  # NOQA
      crs_definition = QgsCoordinateReferenceSystem(crs)
      crs_description = crs_definition.description()
      text = crs_text['string_format'].format(crs=crs_description)
      return text
docs: Retrieve coordinate reference system text string from definitions.
  
      Example usage: crs_text_element('EPSG:3857').