KT element: KtPrefixExpression
FIR element: FirFunctionCallImpl
FIR source kind: KtRealSourceElementKind

FIR element rendered:
R|<local>/x|.R|kotlin/Boolean.not|()

FIR FILE:
FILE: [ResolvedTo(IMPORTS)] unraryExpression.kt
    public final [ResolvedTo(BODY_RESOLVE)] fun foo([ResolvedTo(BODY_RESOLVE)] x: R|kotlin/Boolean|): R|kotlin/Boolean| {
        ^foo R|<local>/x|.R|kotlin/Boolean.not|()
    }