CalculateUpdatedAssetPositions returns a deep-copy of the asset positions with the updates applied.

CalculateUpdatedPerpetualPositions returns a deep-copy of the perpetual positions with the updates applied.

CalculateUpdatedSubaccount returns a copy of the settled subaccount with the updates applied.

For `Match` updates: - returns a struct `OpenInterest` if input updates results in OI delta.

GetRiskForSubaccount returns the risk value of the `Subaccount` after updates are applied.

GetSettledSubaccountWithPerpetuals returns 1.

GetUpdatedAssetPositions filters out all the asset positions on a subaccount that have been updated.

GetUpdatedPerpetualPositions filters out all the perpetual positions on a subaccount that have been updated.

IsValidStateTransitionForUndercollateralizedSubaccount returns an `UpdateResult` denoting whether this state transition is valid.