getJsonPropertyNull
getJsonPropertyNull(name: StringUtf8): Boolean;
The getJsonPropertyNull method of the JadeJsonObject class returns true if a JSON property with a name matching the specified value of the name parameter is found and that property is of the null‑type. If no property is found, the method returns false.
If the property is found but the type is not of the JSON null type, exception 1478 (The json property requested was not of the type requested) is raised.
2022.0.04 and higher