override fun isUsedAsExpression(expression: KtExpression): Boolean =
        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

    init {
        val application = kotlinCoreProjectEnvironment.environment.application
        ApplicationServiceRegistration.registerWithCustomRegistration(application, serviceRegistrars) {
            // TODO (KT-68186): Passing the class loader explicitly is a workaround for KT-68186.
            if (this is FirStandaloneServiceRegistrar) {
                registerApplicationServicesWithCustomClassLoader(application, classLoader)
            } else {

         * getter/setter) then this method is not used at all. Instead
         * [org.jetbrains.kotlin.backend.jvm.lower.ReflectiveAccessLowering.visitGetField] (or visitSetField) generates the access without
         * asking.
         */
        override fun isAccessorWithExplicitImplementation(accessor: IrSimpleFunction): Boolean {
            if (accessor is AbstractFir2IrLazyDeclaration<*>) {
                val fir = accessor.fir