return getKtExpressionNonErrorType(subject)
    }

    private fun getKtExpressionNonErrorType(expression: KtExpression): KtType? =
        getKtExpressionType(expression)?.nonErrorTypeOrNull()

    private fun KtType.nonErrorTypeOrNull(): KtType? = takeUnless { it is KtErrorType }

    private fun PsiElement.isWhileLoopCondition() =