code: def serialize(self):
          
          df = self.copy()
          df['scored_calls'] = df['scored_calls'].apply(lambda x: json.dumps(x))
          df['channel_values'] = df['channel_values'].apply(lambda x: json.dumps(x))
          df['regions'] = df['regions'].apply(lambda x: json.dumps(x))
          df['phenotype_calls'] = df['phenotype_calls'].apply(lambda x: json.dumps(x))
          df['neighbors'] = df['neighbors'].apply(lambda x: json.dumps(x))
          df['frame_shape'] = df['frame_shape'].apply(lambda x: json.dumps(x))
          return df
docs: Convert the data to one that can be saved in h5 structures
  
          Returns:
              pandas.DataFrame: like a cell data frame but serialized. columns