*
     * The missing cases of the when-expression in the following example are Direction.WEST and Direction.EAST:
     *
     * enum class Direction {
     *   NORTH, SOUTH, WEST, EAST
     * }
     * foo = when(direction) {
     *   Direction.NORTH -> 1
     *   Direction.SOUTH -> 2
     *   else -> 3
     * }
     *

interface Intf {
    fun run()
}

abstract class Ordinary

annotation class Anno

@Anno
class Generic<T> : Ordinary(), Intf {
    override fun run() {}
}

enum class Direction {
    NORTH, SOUTH, WEST, EAST
}

sealed class Operation {
    class Add(val firstValue: Int, val secondValue: Int) : Operation()
    class Subtract(val minuend: Int, val subtrahend: Int) : Operation()
    class Negate(val value: Int) : Operation()

        isUsed(expression)

    /**
     * [isUsed] and [doesParentUseChild] are defined in mutual recursion,
     * climbing up the syntax tree, passing control back and forth between the
     * two.
     *
     * Whether an expression is used is defined by the context in which it
     * appears. E.g. a "statement" in a block is considered used if it is the

     * [computePackageNamesWithTopLevelCallables] if either returns `null`. It depends on the declaration provider whether it's worth
     * computing separate package sets for classifiers and callables, or just one set containing all package names.
     */
    public open fun computePackageNames(): Set<String>? = null

    /**

    /**
     * Returns a [KaScope] containing the *static* callables (functions and properties) and all classifiers (classes and objects) explicitly
     * declared in the given [KaSymbolWithMembers].
     *
     * It is worth noting that, while Java classes may contain declarations of static callables freely, in Kotlin only enum classes define

    private synthetic final static field $ENTRIES: kotlin.enums.EnumEntries
    private synthetic final static field $VALUES: Direction[]
    public final enum static field EAST: Direction
    public final enum static field NORTH: Direction
    public final enum static field SOUTH: Direction
    public final enum static field WEST: Direction
    private synthetic final static method $values(): Direction[]
    static method <clinit>(): void