Adds a new scan by the given key.
Adds a new scan by the given key. If a span by that name already exists, the old scan is returned.
Wrap the given set of added and removed keys in an appropriate update message and dispatch it.
Wrap the given set of added and removed keys in an appropriate update message and dispatch it.
The underlying non-reactive map
The underlying non-reactive map
A helper object providing key and value serialization and an event view of the value.
A helper object providing key and value serialization and an event view of the value.