Optional items: M[]Readonly $$isReadonly $$parentReadonly indexProtected isReadonly itemkey to item.
Readonly itemsReadonly mountedset it True, the follow emit will be ignore and then set it False.
Readonly rootProtected _addProtected _clearProtected _removeOptional payload: PlainObjectsplit fire
Optional payload: PlainObjectPrivate installon
once
split on
Create parent-child relationships of two evented objects manually. Because this method not mounted on evented object.
Optional off: booleanPrivate uninstalloff
split off
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The parent of event.
List is a parent of Base or Layer.
This field has the name $$parent declared, which keep consistent with /model/basic/Base.class