def record_activity_task_heartbeat(taskToken=None, details=None):
    """
    Used by activity workers to report to the service that the  ActivityTask represented by the specified taskToken is still making progress. The worker can also (optionally) specify details of the progress, for example percent complete, using the details parameter. This action can also be used by the worker as a mechanism to check if cancellation is being requested for the activity task. If a cancellation is being attempted for the specified task, then the boolean cancelRequested flag returned by the service is set to true .
    This action resets the taskHeartbeatTimeout clock. The taskHeartbeatTimeout is specified in  RegisterActivityType .
    This action does not in itself create an event in the workflow execution history. However, if the task times out, the workflow execution history will contain a ActivityTaskTimedOut event that contains the information from the last heartbeat generated by the activity worker.
    Access Control
    You can use IAM policies to control this action's access to Amazon SWF resources as follows:
    If the caller does not have sufficient permissions to invoke the action, or the parameter values fall outside the specified constraints, the action fails. The associated event attribute's cause parameter will be set to OPERATION_NOT_PERMITTED. For details and example IAM policies, see Using IAM to Manage Access to Amazon SWF Workflows .
    See also: AWS API Documentation
    
    
    :example: response = client.record_activity_task_heartbeat(
        taskToken='string',
        details='string'
    )
    
    
    :type taskToken: string
    :param taskToken: [REQUIRED]
            The taskToken of the ActivityTask .
            Warning
            taskToken is generated by the service and should be treated as an opaque value. If the task is passed to another process, its taskToken must also be passed. This enables it to provide its progress and respond with results.
            

    :type details: string
    :param details: If specified, contains details about the progress of the task.

    :rtype: dict
    :return: {
        'cancelRequested': True|False
    }
    
    
    :returns: 
    taskToken (string) -- [REQUIRED]
    The taskToken of the  ActivityTask .
    
    Warning
    taskToken is generated by the service and should be treated as an opaque value. If the task is passed to another process, its taskToken must also be passed. This enables it to provide its progress and respond with results.
    
    
    details (string) -- If specified, contains details about the progress of the task.
    
    """
    pass
