showCreateRelationButton doesn't seem to work with MorphToMany Relationships

[iHwy]

From the docs:

You may also create related many-to-many relationships from the "attach" and "update attached" pages. To enable this feature, invoke the showCreateRelationButton when defining a BelongsToMany or MorphToMany relationship:

BelongsToMany::make('Roles')->showCreateRelationButton(),

Was this removed, never implemented or am I misunderstanding?

[AnastasiaDolgopolova]

похоже это все еще не работает..
или я это неправильно использую?

[AnastasiaDolgopolova]

проблема решилась при помощи https://github.com/dillingham/nova-attach-many