code: JsonUnmarshaller getJsonUnmarshallerAnnotation(Annotation[] annotations) {
  		for (Annotation annotation : annotations) {
  			if (JsonUnmarshaller.class.isInstance(annotation)) {
  				return (JsonUnmarshaller) annotation;
  			}
  		}
  		return null;
  	}
docs: return the JsonUnmarshaller annotation
  
  @param annotations
  @return