Added for completeness:
Added for completeness:

retrieve(Class<T> type, ETFilter filter);
retrieve(Class<T> type, ETFilter filter, String... properties);
retrieveObject(Class<T> type, ETFilter filter);
retrieveObject(Class<T> type, ETFilter filter, String... properties);
retrieveObjects(Class<T> type, ETFilter filter);
retrieveObjects(Class<T> type, ETFilter filter, String... properties);
retrieveObjects(Class<T> type, Integer page, Integer pageSize, String...
properties);
retrieveObjects(Class<T> type, ETFilter filter Integer page, Integer
pageSize, String... properties);

salesforce-marketingcloud/FuelSDK-Java,salesforcefuel/FuelSDK-Java,viadeo/fuel-java,salesforcefuel/fuel-java,gutsy/fuel-java