ExcludeAction - an action with exclude identifier. It allows a user to exclude entity instances from a collection without removing them from the database. The class
of this action is an inheritor of RemoveAction, however, when triggered it invokes excludeItem() of CollectionDatasource instead of removeItem(). In addition, for an entity in a nested datasource, the ExcludeAction disconnects the link with the parent entity. Therefore this action can be used for editing one-to-many associations.
The following specific methods are defined in the ExcludeAction class in addition to RemoveAction:
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setConfirm()– flag to show the removal confirmation dialog. You can also set this property via the action constructor. By default it is set tofalse.
