return mapping[fir]?.getOrNull()
        }

        override fun visitElement(element: FirElement) {
            withElement(element) {
                if (element in statements) {
                    // The leaf is in mapping, but its value is still 'null'
                    mapping.computeIfAbsent(element) { _ ->
                        unmappedCount -= 1

            registerProvider provider@{ element: KtValueArgument ->
                if (element.isNamed()) return@provider null
                val annotationEntry = element.getParentOfTypeAndBranch<KtAnnotationEntry> { valueArgumentList } ?: return@provider null
                if (annotationEntry.valueArguments.size != 1) return@provider null

                KtDefaultAnnotationArgumentReference(element)
            }
        }
    }

import org.jetbrains.kotlin.utils.exceptions.withPsiEntry

object KtFirReferenceResolver : ResolveCache.PolyVariantResolver<KtReference> {
    class KotlinResolveResult(element: PsiElement) : PsiElementResolveResult(element)

    @OptIn(KtAllowAnalysisOnEdt::class, KtAllowAnalysisFromWriteAction::class)
    override fun resolve(ref: KtReference, incompleteCode: Boolean): Array<ResolveResult> {

import org.jetbrains.kotlin.kdoc.psi.impl.KDocName

internal class KtFirKDocReference(element: KDocName) : KDocReference(element), KtFirReference {
    override fun KtAnalysisSession.resolveToSymbols(): Collection<KtSymbol> {
        val fullFqName = generateSequence(element) { it.parent as? KDocName }.last().getQualifiedNameAsFqName()
        val selectedFqName = element.getQualifiedNameAsFqName()

import org.jetbrains.kotlin.psi.KtElement
import org.jetbrains.kotlin.psi.KtFile

internal class KtFirDiagnosticProvider(
    override val analysisSession: KtFirAnalysisSession,
    override val token: KtLifetimeToken,
) : KtDiagnosticProvider(), KtFirAnalysisSessionComponent {

    override fun getDiagnosticsForElement(
        element: KtElement,
        filter: KtDiagnosticCheckerFilter

            token,
        )
    }

    override fun analyze(elements: List<KtElement>, mode: Fe10AnalysisFacade.AnalysisMode): BindingContext {
        val element = elements.firstOrNull() ?: return BindingContext.EMPTY
        return getHandler(element).resolveSession.orThrowResolutionNotPerformedError().bindingContext
    }

) {
    private val analyzedElements: MutableSet<KtElement> = mutableSetOf()
    private val inlineFunctionsWithBody: MutableSet<KtDeclarationWithBody> = mutableSetOf()

    /**
     * Collects all inline function calls in an [element] (usually a file) and follows each transitively.
     */
    fun analyze(element: KtElement) {
        val project = element.project
        val nextInlineFunctions = HashSet<KtDeclarationWithBody>()

        var i = 0
        val parts = line.split(Regex(" ")).toTypedArray()

        val element = WebPlatformUrlTestData()
        element.input = unescape(parts[i++])

        val base = if (i < parts.size) parts[i++] else null
        element.base =
          when {
            base == null || base.isEmpty() -> list[list.size - 1].base
            else -> unescape(base)
          }

    }

    private inline fun <R> wrapError(element: KtElement, action: () -> R): R {
        return try {
            action()
        } catch (e: Exception) {
            rethrowExceptionWithDetails(
                "Error during resolving call ${element::class}",
                exception = e,
            ) {
                withPsiEntry("psi", element, analysisSession::getModule)

## Composition by architecture modules

Each [architecture module and platform](platforms.md) can contribute code to any of the elements.
Not every module contributes to every element.