in src/rider/main/kotlin/com/jetbrains/observables/ui/dsl/ObservableDslEx.kt [70:76]
override fun setItem(anObject: Any?) {
val item = anObject as? IconItem<TValue>
if (item == null && anObject is String?)
editor.text = anObject
else if (item != null)
editor.text = itemMapper(item.data)
}