class_docstr: Hubspot Deals table.
code: def get_columns(self) -> List[Text]:
      return pd.json_normalize(self.get_deals(limit=1)).columns.tolist()
  
imports: import pandas
  from hubspot.crm.objects import SimplePublicObjectId, SimplePublicObjectBatchInput, SimplePublicObjectInputForCreate, BatchInputSimplePublicObjectId, BatchInputSimplePublicObjectBatchInput, BatchInputSimplePublicObjectInputForCreate
  from mindsdb_sql.parser import ast
  from mindsdb.integrations.handlers.utilities.query_utilities import INSERTQueryParser, SELECTQueryParser, UPDATEQueryParser, DELETEQueryParser, SELECTQueryExecutor, UPDATEQueryExecutor, DELETEQueryExecutor
  from mindsdb.integrations.libs.api_handler import APITable
  from mindsdb.utilities import log
label_desc: Use image node_id 5 for calling the DealsTable obj's underlying member method code with example usage: obj.get_columns() and returns: pd