code: def get(self, task_id=None, params=None):
          
          return self.transport.perform_request('GET', _make_path('_tasks',
              task_id), params=params)
docs: Retrieve information for a particular task.
          `<http://www.elastic.co/guide/en/elasticsearch/reference/current/tasks.html>`_
  
          :arg task_id: Return the task with specified id (node_id:task_number)
          :arg wait_for_completion: Wait for the matching tasks to complete
              (default: false)
          :arg timeout: Maximum waiting time for `wait_for_completion`