KT element: KtStringTemplateExpression
FIR element: FirStringConcatenationCallImpl
FIR source kind: KtRealSourceElementKind

FIR element rendered:
<strcat>(String(string ), Int(1).R|kotlin/Int.plus|(Int(2)), String( template))

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

        public final [ResolvedTo(BODY_RESOLVE)] val x: R|kotlin/String| = <strcat>(String(string ), Int(1).R|kotlin/Int.plus|(Int(2)), String( template))
            public [ResolvedTo(BODY_RESOLVE)] get(): R|kotlin/String|