How to delete a translation of a nullable fields?

[matperez]

Hello!

Thank you for behavior, it saved me a lot of time! Now I have an issue. I used it in my model

                'class' => MultilingualBehavior::class,
                'languages' => [
                    'ru' => 'Russian',
                    'en-En' => 'English',
                ],
                'defaultLanguage' => 'ru',
                'langForeignKey' => 'counterparty_id',
                'tableName' => '{{%counterpartyLang}}',
                'attributes' => [
                    'message',
                ]

Everything seems to work fine except of one thing. I can not delete the value of message field in english. I can only set it to a different value, not no null. According to the source code it is the intended behavior, you only update the field if it's not null.

                if ($value !== null) {
                    $field = $this->localizedPrefix . $attribute;
                    $translation->$field = $value;
                    $save = true;
                }

So how can I delete an existing translation? How to cope with a nullable fields?