destination.filterKeys { key ->
    key in (list1 + list2 + list3)
}

when

destination.filterKeys { key ->
    when (key) {
      in list1, list2, list3 -> true
      else -> false
    }
}

lateinit var sampleString: String

interfaces

sealed classes

Profile.kt
interface Profile

AProfile.kt
class AProfile : Profile { }

BProfile.kt
class BProfile : Profile { }

Profile.kt
sealed class Profile

class AProfile : Profile()
class BProfile : Profile()

var onTextChanged: ((text: String) -> Unit)? = null

onTextChanged = { ... }

String

Any

private val refreshJob = filterFlow
    .onEach { prev, new ->
        if(prev.x != new.x) {
            updateX()
        }
    }
    .launchIn(viewModelScope)

Navigation Component

onActivityCreated

onViewCreated

onViewCreated

onCreate

onCreate

onActivityCreated

onAttach

on_create

viewLifecycleOwner

onCreate

onCreate

class SomeWidget : ConstraintLayout {

    constructor(
        context: Context
    ) : this(context, null) {

    }

    constructor(
        context: Context,
        attrs: AttributeSet?
    ) : this(context, attrs, 0) {

    }

    constructor(
        context: Context,
        attrs: AttributeSet?,
        defStyleAttr: Int
    ) : super(context, attrs, defStyleAttr) {
        inflate()
    }

    fun addSubviews() {
        val views = mutableListOf<View>()
        repeat(2) { count ->
            views.add(
                TextView(context).apply {
                    text = "Test $count"
                    setBackgroundResource(R.drawable.rectangle_debug)
                }
            )
        }
        views.forEach {
            addView(it)
        }

        flow.apply {
            //setWrapMode(Flow.WRAP_CHAIN)
        }

        flow.referencedIds = views.map { it.id }.toIntArray()

        post { requestLayout() }
    }

    private fun inflate() {
        LayoutInflater.from(context).inflate(R.layout.widget_featured_relation, this)
    }
}

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="<http://schemas.android.com/apk/res/android>"
    xmlns:app="<http://schemas.android.com/apk/res-auto>">

    <androidx.constraintlayout.helper.widget.Flow
        android:id="@+id/flow"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="16dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</merge>

override fun onDestroyView() {
    super.onDestroyView()
    _binding = null
}

fun getHumanReadableName(context: Context) =
            context.getString(
                when (this) {
                    POMODORO -> R.string.pomodoro
                    SHORT_BREAK -> R.string.short_break
                    LONG_BREAK -> R.string.long_break
                }
            )

open class BaseViewModel<State : Any, Event : Any> : ViewModel() {



     private val stateLiveData: MutableLiveData<State> = MutableLiveData()

open class BaseFlowViewModel<State : Any, Event : Any> : ViewModel() {





      private val _uiState = MutableStateFlow<State>()

    val uiState: StateFlow<State> = _uiState

ListAdapter

RecyclerView.Adapter