@Override
    public DescribeServicesResult apply(DescribeServicesRequest describeServicesRequest) {
        return client.describeServices(describeServicesRequest);
    }
Makes a call to the operation specified by the waiter by taking the corresponding request and returns the
corresponding result

@param describeServicesRequest
       Corresponding request for the operation
@return Corresponding result of the operation
aws-java-sdk-ecs/src/main/java/com/amazonaws/services/ecs/waiters/DescribeServicesFunction.java