def process_value_in(self, field_name, field_value):
        if field_value == None:
            return None
      
        val = self._process_value_in(field_name, field_value)
        if val != None:
            return val
        else:
            return field_value
process some fields on the way into the object
dataset/ETHPy150Open benadida/helios-server/helios/datatypes/__init__.py/LDObject.process_value_in