Initializes the information for this class from the given JSON data blob.

        :param jdata: <dict>

def loadJSON(self, jdata):
        """
        Initializes the information for this class from the given JSON data blob.

        :param jdata: <dict>
        """
        # required params
        self.__name = jdata['name']
        self.__field = jdata['field']

        # optional fields
        self.__display = jdata.get('display') or self.__display
        self.__flags = jdata.get('flags') or self.__flags
        self.__defaultOrder = jdata.get('defaultOrder') or self.__defaultOrder
        self.__default = jdata.get('default') or self.__default