pub fn validate_instrument_common(
price_precision: u8,
size_precision: u8,
size_increment: Quantity,
multiplier: Quantity,
margin_init: Decimal,
margin_maint: Decimal,
price_increment: Option<Price>,
lot_size: Option<Quantity>,
max_quantity: Option<Quantity>,
min_quantity: Option<Quantity>,
_max_notional: Option<Money>,
_min_notional: Option<Money>,
max_price: Option<Price>,
min_price: Option<Price>,
) -> Result<()>