docs: public static FunctionSQL newSQLFunction(String token,
              CompileContext context) {
  
          int id = regularFuncMap.get(token, -1);
  
          if (id == -1) {
              id = valueFuncMap.get(token, -1);
          }
  
          if (id == -1) {
              return null;
          }
  
          FunctionSQL function = new FunctionSQL(id);
  
          if (id == FUNC_VALUE) {
              if (context.currentDomain == null) {
                  return null;
              }
  
              function.dataType = context.currentDomain;
          }
  
          return function;
      }