Pap_Api_Object::setField PHP Method

        public function setField($name, $value, $operator = self::OPERATOR_EQUALS)
        {
            $record = $this->fields->createRecord($name);
            $record->set(self::FIELD_VALUE, $value);
            $record->set(self::FIELD_OPERATOR, $operator);
            $this->fields->add($record);
        }