KT element: KtBinaryExpression
FIR element: FirFunctionCallImpl
FIR source kind: DesugaredCompoundAssignment

FIR element rendered:
R|<local>/<<array>>|.R|SubstitutionOverride</MyMap.set: R|kotlin/Unit|>|(R|<local>/<<index_0>>|, R|<local>/<<array>>|.R|SubstitutionOverride</MyMap.get: R|kotlin/Int|>|(R|<local>/<<index_0>>|).R|kotlin/Int.plus|(Int(1)))