@Override
    public DescribeSigningJobResult apply(DescribeSigningJobRequest describeSigningJobRequest) {
        return client.describeSigningJob(describeSigningJobRequest);
    }
Makes a call to the operation specified by the waiter by taking the corresponding request and returns the
corresponding result

@param describeSigningJobRequest
       Corresponding request for the operation
@return Corresponding result of the operation
aws-java-sdk-signer/src/main/java/com/amazonaws/services/signer/waiters/DescribeSigningJobFunction.java