override fun createExtensionCandidateChecker(
        originalFile: KtFile,
        nameExpression: KtSimpleNameExpression,
        explicitReceiver: KtExpression?
    ): KtCompletionExtensionCandidateChecker {
        throw NotImplementedError("Method is not implemented for FE 1.0")
    }

    @Suppress("OVERRIDE_DEPRECATION")
    override fun checkExtensionFitsCandidate(
        firSymbolForCandidate: KtCallableSymbol,