public @interface Query
The @QueryGet annotation marks a SimpleBamService method as handling
a GET RPC query. GET calls must not modify any state in the service,
because SET calls are responsible for modifying state. Queries
are matched to results using a long id, which is unique for each
query in the connection. GET queries must send either a queryResult
or a queryError to the caller, because the client may be blocking
waiting for a reply.