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## org.apache.commons.collections.set
Interface CompositeSet.SetMutator

All Superinterfaces:
  CompositeCollection.CollectionMutator

Enclosing interface:
  CompositeSet

public static interface CompositeSet.SetMutator
extends CompositeCollection.CollectionMutator

Define callbacks for mutation operations.

Defining remove() on implementations of SetMutator is pointless as they are never called by CompositeSet.

Method Summary
`void` | `resolveCollision(CompositeSet comp, Set existing, Set added, Collection intersects)` Called when a Set is added to the CompositeSet and there is a collision between existing and added sets.

Methods inherited from interface org.apache.commons.collections.collection.CompositeCollection.CollectionMutator
`add, addAll, remove`

Method Detail

### resolveCollision

    public void resolveCollision(CompositeSet comp,
                                 Set existing,
                                 Set added,
                                 Collection intersects)

  Called when a Set is added to the CompositeSet and there is a collision between existing and added sets.

  If `added` and `existing` still have any intersects after this method returns an IllegalArgumentException will be thrown.

  Parameters:
    `comp` - The CompositeSet being modified
    `existing` - The Set already existing in the composite
    `added` - the Set being added to the composite
    `intersects` - the intersection of th existing and added sets

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