}

    /**
     * We want to unwrap a SUBSTITUTION_OVERRIDE wrapper if it doesn't affect the declaration's signature in any way. If the signature
     * is somehow changed, then we want to keep the wrapper.
     *
     * Such substitute overrides happen because of inheritance.
     *

                    mapping.computeIfAbsent(element) { _ ->
                        unmappedCount -= 1
                        // Here we intentionally use the 'Optional' wrapper to make 'computeIfAbsent' work smoothly
                        Optional.ofNullable(computeTarget(element))
                    }
                }

                if (unmappedCount > 0) {

    add(FirErrors.REDUNDANT_NULLABLE) { firDiagnostic ->
        RedundantNullableImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.PLATFORM_CLASS_MAPPED_TO_KOTLIN) { firDiagnostic ->
        PlatformClassMappedToKotlinImpl(
            firDiagnostic.a,
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }

- [`KT-57757`](https://youtrack.jetbrains.com/issue/KT-57757) Reduce classpath snapshotter memory consumption
- [`KT-56052`](https://youtrack.jetbrains.com/issue/KT-56052) Implement an in-memory wrapper for PersistentHashMap to avoid applying changes to IC caches before successful compilation

#### Fixes

}

private fun ConeKotlinType.simplifyType(
    session: FirSession,
    useSitePosition: PsiElement,
    visited: MutableSet<ConeKotlinType> = mutableSetOf(),
): ConeKotlinType {
    // E.g., Wrapper<T> : Comparable<Wrapper<T>>
    if (!visited.add(this)) return this

    val substitutor = AnonymousTypesSubstitutor(session)
    val visibilityForApproximation = useSitePosition.visibilityForApproximation

        return KtFirAnalysisSession.createAnalysisSessionByFirResolveSession(firResolveSession, validityToken)
    }

    override fun clearCaches() {
        cache.clear()
    }

    /**
     * Note: Races cannot happen because the listener is guaranteed to be invoked in a write action.
     */
    internal class SessionInvalidationListener(val project: Project) : LLFirSessionInvalidationListener {

        val signature = StringCharacterIterator(canonicalSignature)
        val javaType = SignatureParsing.parseTypeString(signature, StubBuildingVisitor.GUESSING_MAPPER)
        val typeInfo = TypeInfo.fromString(javaType, false)
        val typeText = TypeInfo.createTypeText(typeInfo) ?: return null

        return SyntheticTypeElement(useSitePosition, typeText)
    }

            is KtArrayAccessExpression ->
                child in parent.indexExpressions || parent.arrayExpression == child

            // Calls use only the callee directly -- arguments are wrapped in a
            // KtValueArgument container
            is KtCallExpression ->
                parent.calleeExpression == child && doesCallExpressionUseCallee(child)

        if (function.bodyBlockExpression != null) {
            // Given `fun f(...): R { blockExpression }`, `{ blockExpression }` is mapped to the enclosing anonymous function,
            // which may raise an exception if we attempt to retrieve, e.g., callable declaration from it.
            return null
        }