java.lang.UnsupportedOperationException: Implementation not necessary.
at [uk.ac](http://uk.ac/).ebi.spot.ols.neo4j.service.PropertyJsTreeBuilder.getJsTreeRoots(PropertyJsTreeBuilder.java:71)
at [uk.ac](http://uk.ac/).ebi.spot.ols.neo4j.service.AbstractJsTreeBuilder.cachePreferredRoots(AbstractJsTreeBuilder.java:145)
at [uk.ac](http://uk.ac/).ebi.spot.ols.neo4j.service.AbstractJsTreeBuilder.cacheRoots(AbstractJsTreeBuilder.java:131)
at [uk.ac](http://uk.ac/).ebi.spot.ols.neo4j.service.AbstractJsTreeBuilder.getJsTree(AbstractJsTreeBuilder.java:82)
at [uk.ac](http://uk.ac/).ebi.spot.ols.controller.api.OntologyPropertyController.getJsTree(OntologyPropertyController.java:211)
e.g. http://www.ebi.ac.uk/ols/api/ontologies/genepio/properties/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FIAO_0000114/jstree