code: def get_columns(self):
      return ["dates", "steps"]
  
file_path: mindsdb/mindsdb/integrations/handlers/google_fit_handler/google_fit_tables.py
imports: from mindsdb.integrations.libs.api_handler import APITable
  from mindsdb.integrations.libs.response import HandlerResponse
  from mindsdb.integrations.utilities.sql_utils import extract_comparison_conditions
  from mindsdb_sql.parser import ast
  import datetime
  import pytz
  import time
  from tzlocal import get_localzone
label_desc: Use image node_id 3 for calling the GoogleFitTable obj's underlying member method code with example usage: obj.get_columns() and returns: list