KT element: KtIsExpression
FIR element: FirTypeOperatorCallImpl
FIR source kind: KtRealSourceElementKind

FIR element rendered:
(R|<local>/x| is R|kotlin/String|)

FIR FILE:
FILE: [ResolvedTo(IMPORTS)] isExpressionScript.kts
    context(<script>@R|kotlin/script/templates/standard/ScriptTemplateWithArgs|)
    SCRIPT: [ResolvedTo(TYPES)] <script-isExpressionScript.kts>
        [ResolvedTo(TYPES)] lval args: R|kotlin/Array<kotlin/String>|

        public final [ResolvedTo(BODY_RESOLVE)] fun foo([ResolvedTo(BODY_RESOLVE)] x: R|kotlin/Any|): R|kotlin/Boolean| {
            ^foo (R|<local>/x| is R|kotlin/String|)
        }