code: def disconnect(self):
      if self.connection:
          self.connection.close()
  
file_path: evadb/evadb/third_party/databases/mysql/mysql_handler.py
imports: import mysql.connector
  import pandas
  from evadb.third_party.databases.types import DBHandler, DBHandlerResponse, DBHandlerStatus
label_desc: Use image node_id 3 for calling the MysqlHandler obj's underlying member method code with example usage: obj.disconnect() without return types