docs: def get_row_data(row, column_name, cat_time_ns = True):
      """
      Retrieves the requested column's data from the given row.
      
      @cat_time_ns: If the column_name has "_time" in it, will concatenate 
      the column with any column having the same name but "_time_ns".
      """
      column_name_ns = re.sub(r'_time', r'_time_ns', column_name)
      try:
          rowattrs = [attr for attr in row.__slots__]
      except AttributeError:
          rowattrs = [attr for attr in row.__dict__.iterkeys()]
  
      if cat_time_ns and "_time" in column_name and column_name_ns in rowattrs:
          return int(getattr(row, column_name)) + 10**(-9.)*int(getattr(row, column_name_ns))
      else:
          return getattr(row, column_name)