code: def normalize_symbol(self, symbol):
      return symbol
  
imports: import abc
  import sys
  import datetime
  from abc import ABC
  from pathlib import Path
  import fire
  import pandas
  from loguru import logger
  from dateutil.tz import tzlocal
  from data_collector.base import BaseCollector, BaseNormalize, BaseRun
  from data_collector.utils import deco_retry
  from pycoingecko import CoinGeckoAPI
  from time import mktime
  from datetime import datetime
  import time
label_desc: Use image node_id 2 for calling the CryptoCollector1d obj's underlying member method code with example usage: obj.normalize_symbol(symbol) and returns: symbol