Method ConversationService::common() does not exist

[mooxnl]

According to the documentation, you can Get common conversations among participants using:

$conversations = Chat::conversations()->common($participants);

But that method doesn't exist.

Steps to reproduce the behavior:

$participants = [$model1, $model2];
$conversations = Chat::conversations()->common($participants);

Expected behavior
Return a list of conversations between $model1 and $model2.

Additional context
The between() method could be used for this, however, that method only works for 2 models and conversations that are private.

[goper-leo]

@mooxnl it was removed