Constructor: sendMessageCancelAction
Invalidate all previous action updates. E.g. when user deletes entered text or aborts a video upload.
Type: SendMessageAction
Example:
$sendMessageCancelAction = ['_' => 'sendMessageCancelAction'];
Invalidate all previous action updates. E.g. when user deletes entered text or aborts a video upload.
$sendMessageCancelAction = ['_' => 'sendMessageCancelAction'];