docs: @Override
      public FunctionKind getKind() {
          String kindValueOnV11 = this.getAdditionalAttributes().get(KIND_QNAME);
          if (kindValueOnV11 == null || kindValueOnV11.isEmpty()) {
              return FunctionKind.FEEL;
          } else {
              switch (kindValueOnV11) {
                  case "F":
                      return FunctionKind.FEEL;
                  case "J":
                      return FunctionKind.JAVA;
                  case "P":
                      return FunctionKind.PMML;
                  default:
                      return FunctionKind.FEEL;
              }
          }
      }