|SubnetRouteRef (SubnetRoute< A > *route)|
|SubnetRouteRef (const SubnetRouteRef< A > &ref)|
|SubnetRoute< A > *||route () const|
|SubnetRoute< A > *||_route|
a class to hold a reference to a SubnetRoute
SubnetRouteRef holds a reference to a SubnetRoute. When it is deleted or goes out of scope, the SubnetRoute's reference count will be decreased, and the SubnetRoute may be deleted if the reference count reaches zero.