checkParameter(rootTreeId.isPresent(), "Couldn't resolve '" + refspec
+ "' to a treeish object");
RevTree rootTree = geogig.getRepository().getTree(rootTreeId.get());
Optional<NodeRef> featureTypeTree = geogig.command(FindTreeChild.class)
.setChildPath(refspec.split(":")[1]).setParent(rootTree).setIndex(true).call();
checkParameter(featureTypeTree.isPresent(), "pathspec '" + refspec.split(":")[1]
+ "' did not match any valid path");