Fix some inspection issues

domain/src/commonMain/kotlin/ch/dissem/yaep/domain/Game.kt

@@ -6,9 +6,10 @@ class Game(
     val grid: Grid,
     val clues: Collection<Clue>
 ) {
-    val log = KotlinLogging.logger {  }
-    val horizontalClues = clues.filterIsInstance<HorizontalClue>()
-    val verticalClues = clues.filterIsInstance<SameColumnClue<ItemClass<*>, ItemClass<*>>>()
+    private val log = KotlinLogging.logger { }
+    val horizontalClues: List<HorizontalClue> = clues.filterIsInstance<HorizontalClue>()
+    val verticalClues: List<SameColumnClue<ItemClass<*>, ItemClass<*>>> =
+        clues.filterIsInstance<SameColumnClue<ItemClass<*>, ItemClass<*>>>()
 
     private val onStartListeners = mutableListOf<() -> Unit>()
     private val onSolvedListeners = mutableListOf<() -> Unit>()

domain/src/commonMain/kotlin/ch/dissem/yaep/domain/GameCell.kt

@@ -44,9 +44,6 @@ fun <C : ItemClass<C>> GameCell<C>?.mayBe(item: Item<C>, mayHaveSelection: Boole
     this != null &&
             ((mayHaveSelection && selection == item) || (selection == null && options.contains(item)))
 
-fun <C : ItemClass<C>> GameCell<C>?.isA(item: Item<C>): Boolean =
-    this != null && selection == item
-
 fun <C : ItemClass<C>> GameCell<C>?.hasNoSelection(): Boolean =
     this != null && this.selection == null
 

domain/src/commonMain/kotlin/ch/dissem/yaep/domain/GameRow.kt

@@ -1,5 +1,6 @@
 package ch.dissem.yaep.domain
 
+@Suppress("JavaDefaultMethodsNotOverriddenByDelegation")
 class GameRow<C : ItemClass<C>>(
     val category: ItemClassCompanion<C>,
     val options: List<Item<C>>,
@@ -79,4 +80,5 @@ class GameRow<C : ItemClass<C>>(
         }
         return didChange
     }
+
 }

domain/src/commonMain/kotlin/ch/dissem/yaep/domain/Grid.kt

@@ -1,6 +1,6 @@
 package ch.dissem.yaep.domain
 
-@Suppress("UNCHECKED_CAST")
+@Suppress("UNCHECKED_CAST", "JavaDefaultMethodsNotOverriddenByDelegation")
 class Grid(
     val rows: List<GameRow<*>>
 ) : List<GameRow<ItemClass<*>>> by rows as List<GameRow<ItemClass<*>>> {
@@ -41,7 +41,7 @@ class Grid(
     }
 }
 
-fun List<List<Item<ItemClass<*>>>>.toGrid() = Grid(
+fun List<List<Item<ItemClass<*>>>>.toGrid(): Grid = Grid(
     map { row ->
         GameRow(
             category = row.first().itemType.companion,

domain/src/commonMain/kotlin/ch/dissem/yaep/domain/ObservableSet.kt

@@ -1,5 +1,6 @@
 package ch.dissem.yaep.domain
 
+@Suppress("JavaDefaultMethodsNotOverriddenByDelegation")
 class ObservableSet<E> private constructor(
     private val mutableSet: MutableSet<E>,
     private val onElementChanged: (before: Set<E>, after: Set<E>) -> Unit

domain/src/commonMain/kotlin/ch/dissem/yaep/domain/clues.kt

@@ -85,7 +85,7 @@ class NeighbourClue<A : ItemClass<A>, B : ItemClass<B>>(val a: Item<A>, val b: I
         return removed
     }
 
-    override fun toString() = "$aType is next to $bType"
+    override fun toString(): String = "$aType is next to $bType"
 
     companion object : ClueParser {
         override fun <T : ItemClass<T>> parse(
@@ -147,7 +147,7 @@ class OrderClue<L : ItemClass<L>, R : ItemClass<R>>(val left: Item<L>, val right
         return removed
     }
 
-    override fun toString() = "$leftType is left of $rightType"
+    override fun toString(): String = "$leftType is left of $rightType"
 
     companion object : ClueParser {
         override fun <T : ItemClass<T>> parse(
@@ -377,7 +377,7 @@ class SameColumnClue<A : ItemClass<A>, B : ItemClass<B>>(val a: Item<A>, val b:
 }
 
 class PositionClue<C : ItemClass<C>>(val item: Item<C>, val index: Int) : Clue() {
-    val itemType = item.itemType
+    val itemType: C = item.itemType
 
     override fun isValid(grid: Grid): Boolean {
         val i = grid.indexOf(item.itemType)
@@ -401,7 +401,7 @@ class PositionClue<C : ItemClass<C>>(val item: Item<C>, val index: Int) : Clue()
         return removed
     }
 
-    override fun toString() = "$itemType is at position $index"
+    override fun toString(): String = "$itemType is at position $index"
 
     companion object : ClueParser {
         override fun <T : ItemClass<T>> parse(

domain/src/commonMain/kotlin/ch/dissem/yaep/domain/items.kt

@@ -11,7 +11,7 @@ enum class Animal(symbol: String) : ItemClass<Animal> {
 
     override val symbols: Array<String> = arrayOf(symbol)
 
-    override val companion
+    override val companion: Animal.Companion
         get() = Animal
 
     companion object : ItemClassCompanion<Animal> {
@@ -31,7 +31,7 @@ enum class Nationality(symbol: String) : ItemClass<Nationality> {
 
     override val symbols: Array<String> = arrayOf(symbol)
 
-    override val companion
+    override val companion: Nationality.Companion
         get() = Nationality
 
     companion object : ItemClassCompanion<Nationality> {
@@ -50,7 +50,7 @@ enum class Drink(symbol: String) : ItemClass<Drink> {
 
     override val symbols: Array<String> = arrayOf(symbol)
 
-    override val companion
+    override val companion: Drink.Companion
         get() = Drink
 
     companion object : ItemClassCompanion<Drink> {
@@ -70,7 +70,7 @@ enum class Profession(symbol: String) : ItemClass<Profession> {
 
     override val symbols: Array<String> = idic(symbol)
 
-    override val companion
+    override val companion: Profession.Companion
         get() = Profession
 
     companion object : ItemClassCompanion<Profession> {
@@ -92,7 +92,7 @@ enum class Fruit(symbol: String) : ItemClass<Fruit> {
 
     override val symbols: Array<String> = arrayOf(symbol)
 
-    override val companion
+    override val companion: Fruit.Companion
         get() = Fruit
 
     companion object : ItemClassCompanion<Fruit> {
@@ -113,7 +113,7 @@ enum class Dessert(symbol: String) : ItemClass<Dessert> {
 
     override val symbols: Array<String> = arrayOf(symbol)
 
-    override val companion
+    override val companion: Dessert.Companion
         get() = Dessert
 
     companion object : ItemClassCompanion<Dessert> {
@@ -132,7 +132,7 @@ enum class Transportation(symbol: String) : ItemClass<Transportation> {
 
     override val symbols: Array<String> = arrayOf(symbol)
 
-    override val companion
+    override val companion: Transportation.Companion
         get() = Transportation
 
     companion object : ItemClassCompanion<Transportation> {

domain/src/commonTest/kotlin/ch/dissem/yaep/domain/ClueTest.kt

@@ -1,11 +1,11 @@
 package ch.dissem.yaep.domain
 
 abstract class ClueTest {
-    protected val size = 6
+    protected val size: Int = 6
 
     protected fun createGrid(
         selection: (Item<ItemClass<*>>) -> Item<ItemClass<*>>? = { it }
-    ) = Grid(
+    ): Grid = Grid(
         ItemClass.randomClasses(size)
             .map {
                 it.randomItems(size).map { item -> Item(item) }