docs: public void calcFillSettings(String field, Map<String,Object> attributes) {
          String capitalizedFieldName = StringUtils.capitalize(field);
          String methodName = "doFill" + capitalizedFieldName + "Items";
          Method method = ReflectionUtils.getPublicMethodNamed(getClass(), methodName);
          if(method==null)
              throw new IllegalStateException(String.format("%s doesn't have the %s method for filling a drop-down list", getClass(), methodName));
  
          // build query parameter line by figuring out what should be submitted
          List<String> depends = buildFillDependencies(method, new ArrayList<>());
  
          if (!depends.isEmpty())
              attributes.put("fillDependsOn",Util.join(depends," "));
          attributes.put("fillUrl", String.format("%s/%s/fill%sItems", getCurrentDescriptorByNameUrl(), getDescriptorUrl(), capitalizedFieldName));
      }