private static TreeView getDependencyView(TextAnnotation ta, Annotator viewGenerator) {
if (!ta.hasView(viewGenerator.getViewName())) {
synchronized (FeatureInputTransformer.class) {
if (!ta.hasView(viewGenerator.getViewName())) {
try {
ta.addView(viewGenerator);
} catch (AnnotatorException e) {
throw new RuntimeException(e);
}
}
}
}
return (TreeView) ta.getView(viewGenerator.getViewName());
}