pub(crate) fn settle(
app: &mut Playground,
domains: &mut Domains,
domain: DomainHandle<EuclideanR4>,
step: Step,
) -> Result<(), DomainError>pub(crate) fn settle(
app: &mut Playground,
domains: &mut Domains,
domain: DomainHandle<EuclideanR4>,
step: Step,
) -> Result<(), DomainError>