public class ObservableSet extends Object
 Set decorator that will trigger PropertyChangeEvents when a value changes.
 An optional Closure may be specified and will work as a filter, if it returns true the property
 will trigger an event (if the value indeed changed), otherwise it won't. The Closure may receive
 1 or 2 parameters, the single one being the value, the other one both the key and value, for
 example:
 
 // skip all properties whose value is a closure
 def set = new ObservableSet( {!(it instanceof Closure)} )
 <p/>
 // skip all properties whose name matches a regex
 def set = new ObservableSet( { name, value -> !(name =˜ /[A-Z+]/) } )
 
 The current implementation will trigger specialized events in the following scenarios, you need
 not register a different listener as those events extend from PropertyChangeEvent
 Bound properties
| Modifiers | Name | Description | 
|---|---|---|
| enum | ObservableSet.ChangeType | |
| static class | ObservableSet.ElementAddedEvent | |
| static class | ObservableSet.ElementClearedEvent | |
| static class | ObservableSet.ElementEvent | |
| static class | ObservableSet.ElementRemovedEvent | |
| static class | ObservableSet.MultiElementAddedEvent | |
| static class | ObservableSet.MultiElementRemovedEvent | |
| protected class | ObservableSet.ObservableIterator | 
| Modifiers | Name | Description | 
|---|---|---|
| static String | CONTENT_PROPERTY | |
| static String | SIZE_PROPERTY | 
| Constructor and description | 
|---|
| ObservableSet
                                () | 
| ObservableSet
                                (Set<E> delegate) | 
| ObservableSet
                                (Closure test) | 
| ObservableSet
                                (Set<E> delegate, Closure test) | 
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