Feature fsArrayFeat = cas.getDocumentAnnotation().getType()
.getFeatureByBaseName("fsArray");
ArrayFS fsArrayFS = cas.createArrayFS(2);
fsArrayFS.set(0, cas.getDocumentAnnotation());
fsArrayFS.set(1, cas.getDocumentAnnotation());
fsArrayFS.toStringArray();
cas.getDocumentAnnotation().setFeatureValue(fsArrayFeat, fsArrayFS);
path = "/fsArray";
featurePath = new FeaturePathImpl();
featurePath.initialize(path);
featurePath.typeInit(cas.getDocumentAnnotation().getType());