a LiveData only notifies when its value changes

LiveChange.kt

class LiveChange<T>(val source: LiveData<T>, ignoreFirst: Boolean = false) : MediatorLiveData<T>() {
    private var shouldIgnoreNext: Boolean = ignoreFirst

    init {
        addSource(source) {
            if (shouldIgnoreNext) {
                shouldIgnoreNext = false
            } else {
                if (value != it) value = it
            }
        }
    }

}