Function tor_circmgr::mgr::abstract_spec_find_supported

pub(crate) fn abstract_spec_find_supported<'a, 'b, S: AbstractSpec, C: AbstractCirc>(
    list: impl Iterator<Item = &'b mut OpenEntry<S, C>>,
    usage: &S::Usage
) -> Vec<&'b mut OpenEntry<S, C>>

Default implementation of AbstractSpec::find_supported; provided as a separate function so it can be used in overridden implementations.

This returns the all circuits in list for which circuit.spec.supports(usage) returns true.