code: def post_process_symbol_metadata(self, asset_id, sym_md, sym_data):
      start_date = sym_data.index[0]
      end_date = sym_data.index[-1]
      ac_date = end_date + pd.Timedelta(days=1)
      min_trade_size = 0.00000001
  
      return (
          sym_md.symbol,
          start_date,
          end_date,
          ac_date,
          min_trade_size,
      )
  
file_path: catalyst/catalyst/data/bundles/poloniex.py
imports: import sys
  from six.moves.urllib.parse import urlencode
  import pandas
  from catalyst.data.bundles.core import register_bundle
  from catalyst.data.bundles.base_pricing import BaseCryptoPricingBundle
  from catalyst.utils.memoize import lazyval
  from catalyst.curate.poloniex import PoloniexCurator
label_desc: Use image node_id 7 for calling the PoloniexBundle obj's underlying member method code with example usage: obj.post_process_symbol_metadata(asset_id, sym_md, sym_data) and returns: sym_md,  start_date,  end_date,  ac_date,  min_trade_size