if (symbol is KtFirPackageSymbol || symbol is KtReceiverParameterSymbol) return null
        require(symbol is KtFirSymbol<*>) { "${this::class}" }

        // Optimization: Avoid building `firSymbol` of `KtFirPsiJavaClassSymbol` if it definitely isn't deprecated.
        if (symbol is KtFirPsiJavaClassSymbol && !symbol.mayHaveDeprecation()) {
            return null
        }

            // library modules might still be valid. This is not a problem, though, because analysis session caching is not required for
            // correctness, but rather a performance optimization.
            analysisSessionProvider.clearCaches()
        }
    }
}

private fun KClass<out KtLifetimeToken>.flushPendingChanges(project: Project) {
    if (this == KtReadActionConfinementLifetimeToken::class &&