KT element: KtPostfixExpression
FIR element: FirFunctionCallImpl
FIR source kind: DesugaredIncrementOrDecrement

FIR element rendered:
R|<local>/<array>|.R|SubstitutionOverride</MyMap.set: R|kotlin/Unit|>|(R|<local>/<index_0>|, R|<local>/<unary>|.R|/A.inc|())
