PlaceHolder.detach()
TODO
PlaceHolder.hideOtherMarkers()
Hides all over markers in the [[EditSession EditSession]] that are not the currently selected one.
InternalPlaceHolder@onCursorChange(e)
Emitted when the cursor changes.
Optionalevent: anyPlaceHolder.setup()
TODO
PlaceHolder.showOtherMarkers()
TODO
PlaceHolder.cancel()
TODO