public class ObservableMap extends Object implements Map
 Map 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 map = new ObservableMap( {!(it instanceof Closure)} )
 // skip all properties whose name matches a regex
 def map = new ObservableMap( { 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 | ObservableMap.ChangeType | |
| static class | ObservableMap.MultiPropertyEvent | |
| static class | ObservableMap.PropertyAddedEvent | |
| static class | ObservableMap.PropertyClearedEvent | |
| static class | ObservableMap.PropertyEvent | |
| static class | ObservableMap.PropertyRemovedEvent | |
| static class | ObservableMap.PropertyUpdatedEvent | 
| Modifiers | Name | Description | 
|---|---|---|
| static String | CLEARED_PROPERTY | |
| static String | CONTENT_PROPERTY | |
| static String | SIZE_PROPERTY | 
| Constructor and description | 
|---|
| ObservableMap
                                () | 
| ObservableMap
                                (Closure test) | 
| ObservableMap
                                (Map delegate) | 
| ObservableMap
                                (Map delegate, Closure test) | 
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