docs: def transform(self, col):
          """Prepare the transformer to convert data and return the processed table.
  
          Args:
              col(pandas.DataFrame): Data to transform.
  
          Returns:
              pandas.DataFrame
          """
          out = pd.DataFrame()
          out[self.col_name] = self.safe_datetime_cast(col)
          out[self.col_name] = self.to_timestamp(out)
  
          return out