code: def get_columns(self) -> List[Text]:
      return pd.json_normalize(
          self.get_subscriptions(count=1)
      ).columns.tolist()
  
imports: import paypalrestsdk
  import pandas
  from typing import Text, List, Dict
  from mindsdb_sql.parser import ast
  from mindsdb.integrations.libs.api_handler import APITable
  from mindsdb.integrations.handlers.utilities.query_utilities import SELECTQueryParser, SELECTQueryExecutor
label_desc: Use image node_id 2 for calling the SubscriptionsTable obj's underlying member method code with example usage: obj.get_columns() and returns: pd