// For postfix case, the last argument is the operation call invoked on a synthetic local variable `<unary>`. This local
                // variable is initialized by calling the `get` function.
                val operationCall = lastArg as? FirFunctionCall ?: return null
                val operationPartiallyAppliedSymbol = operationCall.toPartiallyAppliedSymbol(arrayAccessExpression) ?: return null