pub fn apply_fill_accounting(
positions: &mut EnginePositionMap,
cash_balances: &mut HashMap<WalletAddress, Decimal>,
fill: &Fill,
) -> FillAccountingpub fn apply_fill_accounting(
positions: &mut EnginePositionMap,
cash_balances: &mut HashMap<WalletAddress, Decimal>,
fill: &Fill,
) -> FillAccounting