code: @SafeVarargs
      public static Map<String, Object> payloadFactory(Map.Entry<String, Object>... entries) {
          Map<String, Object> map = new HashMap<>();
  
          for (Map.Entry<String, Object> entry : entries)
              map.put(entry.getKey(), entry.getValue());
  
          return Collections.unmodifiableMap(map);
      }
docs: This method was created to simplify the construction of request payloads. However, the use of this method
  shouldn't be compulsory and you can also use plain old Maps.
  
  @param   entries
  {@code Map.Entry<String, Object>} the entries that will describe the request payload.
  
  @return  {@code Map<String, Object>}