code: private JsonProperty getJsonPropertyFromGetterSetter(JMethod getter, JMethod setter) {
          JsonProperty setterProp = getAnnotation(setter, JsonProperty.class);
          return (null != setterProp) ? setterProp : getAnnotation(getter, JsonProperty.class);
      }
docs: Get {@link JsonProperty} from getter or setter. Annotation from setter is preferred to getter.
  
  @param getter
  @param setter
  @return