def cancel_job(jobId=None, reason=None):
    """
    Cancels jobs in an AWS Batch job queue. Jobs that are in the SUBMITTED , PENDING , or RUNNABLE state are cancelled. Jobs that have progressed to STARTING or RUNNING are not cancelled (but the API operation still succeeds, even if no jobs are cancelled); these jobs must be terminated with the  TerminateJob operation.
    See also: AWS API Documentation
    
    Examples
    This example cancels a job with the specified job ID.
    Expected Output:
    
    :example: response = client.cancel_job(
        jobId='string',
        reason='string'
    )
    
    
    :type jobId: string
    :param jobId: [REQUIRED]
            A list of up to 100 job IDs to cancel.
            

    :type reason: string
    :param reason: [REQUIRED]
            A message to attach to the job that explains the reason for cancelling it. This message is returned by future DescribeJobs operations on the job. This message is also recorded in the AWS Batch activity logs.
            

    :rtype: dict
    :return: {}
    
    
    :returns: 
    (dict) --
    
    """
    pass
