val fullQualifiedAccess = when (val psi = fir.source.psi) {
            // for cases like `Foo.Bar()`, where `Foo.Bar` is an object, and `Foo.Bar()` is a call to `invoke` operator
            is KtSimpleNameExpression -> psi.getQualifiedElement()
            else -> psi
        }
        if (fullQualifiedAccess !is KtDotQualifiedExpression) return referencedSymbolsByFir

        private val mapping = HashMap<FirElement, Optional<FirElement>>()
        private var unmappedCount = statements.size

        private val stack = ArrayDeque<FirElement>()

        operator fun get(fir: FirElement): FirElement? {
            return mapping[fir]?.getOrNull()
        }

        override fun visitElement(element: FirElement) {
            withElement(element) {

            Errors.MANY_LAMBDA_EXPRESSION_ARGUMENTS,
            Errors.UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE,
            Errors.TOO_MANY_ARGUMENTS,
            Errors.REDUNDANT_SPREAD_OPERATOR_IN_NAMED_FORM_IN_FUNCTION,
            Errors.REDUNDANT_SPREAD_OPERATOR_IN_NAMED_FORM_IN_ANNOTATION,
            *Errors.TYPE_MISMATCH_ERRORS.toTypedArray(),
        )

 * and the argument, are compile-time constant as well.
 */
internal object FirCompileTimeConstantEvaluator {
    // TODO: Handle boolean operators, class reference, array, annotation values, etc.
    fun evaluate(
        fir: FirElement?,
        mode: KtConstantEvaluationMode,
    ): FirLiteralExpression<*>? =
        when (fir) {