@Override
    public ListQualificationTypesResult listQualificationTypes(ListQualificationTypesRequest request) {
        request = beforeClientExecution(request);
        return executeListQualificationTypes(request);
    }
<p>
The <code>ListQualificationTypes</code> operation returns a list of Qualification types, filtered by an optional
search term.
</p>

@param listQualificationTypesRequest
@return Result of the ListQualificationTypes operation returned by the service.
@throws ServiceException
        Amazon Mechanical Turk is temporarily unable to process your request. Try your call again.
@throws RequestErrorException
        Your request is invalid.
@sample AmazonMTurk.ListQualificationTypes
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/mturk-requester-2017-01-17/ListQualificationTypes"
     target="_top">AWS API Documentation</a>
aws-java-sdk-mechanicalturkrequester/src/main/java/com/amazonaws/services/mturk/AmazonMTurkClient.java