val binaryExpression = expression.unwrapQualified<KtBinaryExpression> { binaryExpression, operand ->
            binaryExpression.operationToken == KtTokens.ELVIS && (operand == binaryExpression.left || operand == binaryExpression.right)
        } ?: return null
        if (expression !is KtExpression) return null

        require(qualifierIndex != -1) { "Whole type $wholeType should contain $nestedType, but it didn't" }
        return qualifierIndex
    }

    private val syntheticTokenTypes = TokenSet.create(KtTokens.ELVIS, KtTokens.EXCLEXCL)

            token,
        )
    }
    add(FirErrors.USELESS_ELVIS) { firDiagnostic ->
        UselessElvisImpl(
            firSymbolBuilder.typeBuilder.buildKtType(firDiagnostic.a),
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.USELESS_ELVIS_RIGHT_IS_NULL) { firDiagnostic ->
        UselessElvisRightIsNullImpl(