code: def save_configuration(self, configuration_file):
          '''Saving configuration
  
          Parameters
          ----------
          configuration_file : string
              Filename of the configuration file.
          '''
          if not isinstance(configuration_file, tb.file.File) and os.path.splitext(configuration_file)[1].strip().lower() != ".h5":
              return save_configuration_to_text_file(self, configuration_file)
          else:
              return save_configuration_to_hdf5(self, configuration_filef save_configuration(self, configuration_file):
          '''Saving configuration
  
          Parameters
          ----------
          configuration_file : string
              Filename of the configuration file.
          '''
          if not isinstance(configuration_file, tb.file.File) and os.path.splitext(configuration_file)[1].strip().lower() != ".h5":
              return save_configuration_to_text_file(self, configuration_file)
          else:
              return save_configuration_to_hdf5(self, configuration_file)
docs: Saving configuration
  
          Parameters
          ----------
          configuration_file : string
              Filename of the configuration file.