The channel module contains the Channel and ChannelList structs.
The client module contains the Client and ClientList structs.
command contains a trait for a Command, that can be send to a Server Query server.
The connection module contains the Connection struct, that provides an interface for a Server Query connection.
error provides newtypes and Error's for sqlib.
escaping provides functions for the Server Query escaping.
map provides functions around StringMap (HashMap<String, String>).
The prelude exports all important structs and functions of sqlib.