code: def __init__(self, instrument: str, field: str, freq: str, **kwargs):
      self.instrument = instrument
      self.field = field
      self.freq = freq
      self.kwargs = kwargs
  
imports: import re
  from typing import Iterable, overload, Tuple, List, Text, Union, Dict
  import numpy
  import pandas
  from qlib.log import get_module_logger
label_desc: Use image node_id 1 to create a new FeatureStorage object from inherited base classes: BaseStorage with example: obj = FeatureStorage(instrument, field, freq)