code: protected void onFieldCustom(final Object obj, final Field field, final Bin annotation, final Object customFieldProcessor, final Object value) {
  
    }
docs: Notification about custom field.
  
  @param obj                  the object instance, must not be null
  @param field                the custom field, must not be null
  @param annotation           the annotation for the field, must not be null
  @param customFieldProcessor processor for custom fields, must not be null
  @param value                the value of the custom field