Database name.
Subject command.
Subject command.
Database name.
Produces the reactivemongo.core.protocol.Query instance for the given command.
Returns the reactivemongo.core.protocol.RequestMaker for the given command, using the given ReadPreference.
Returns the reactivemongo.core.protocol.RequestMaker for the given command.
A makable command, that can produce a request maker ready to be sent to a reactivemongo.core.actors.MongoDBSystem actor.