code: def _check_experiment(self, name):
          
          with h5py.File(name=self.path, mode="r") as h5:
              sigpath = "/Experiments/{}/metadata/Signal".format(name)
              signal_type = h5[sigpath].attrs["signal_type"]
          if signal_type != "hologram":
              msg = "Signal type '{}' not supported: {}[{}]".format(signal_type,
                                                                    self.path,
                                                                    name)
              warnings.warn(msg, WrongSignalTypeWarnging)
          return signal_type == "hologram"
docs: Check the signal type of the experiment
  
          Returns
          -------
          True, if the signal type is supported, False otherwise
  
          Raises
          ------
          Warning if the signal type is not supported