internal val KotlinType.ktNullability: KtTypeNullability
    get() = when {
        this.isNullabilityFlexible() -> KtTypeNullability.UNKNOWN
        this.isMarkedNullable -> KtTypeNullability.NULLABLE
        else -> KtTypeNullability.NON_NULLABLE
    }

internal val DeclarationDescriptorWithVisibility.ktVisibility: Visibility
    get() = when (visibility) {
        DescriptorVisibilities.PUBLIC -> Visibilities.Public

    private enum class DeclaredMemberScopeKind {
        NON_STATIC,

        STATIC,

        /**
         * A scope containing both non-static and static members. A smart combined scope (as opposed to a naive combination of [KtScope]s
         * with [getCompositeScope]) avoids duplicate inner classes, as they are contained in non-static and static scopes.
         *