code: def _set_alive(self, task_id):
      db_date = db.session.query(sa.func.current_timestamp()).first()[0]
      task = db.Tasks.query.get(task_id)
      task.alive_time = db_date
      db.session.commit()
  
file_path: mindsdb/mindsdb/interfaces/tasks/task_monitor.py
imports: import datetime
  import os
  import socket
  import time
  import sqlalchemy
  from mindsdb.interfaces.storage import db
  from mindsdb.utilities import log
  from mindsdb.utilities.config import Config
  from .task_thread import TaskThread
label_desc: Use image node_id 6 for calling the TaskMonitor obj's underlying member method code with example usage: obj._set_alive(task_id) without return types