Hal_interfaces.Org_freedesktop_Hal_Device_Ledsval interface : OBus_name.interfaceval m_GetBrightness : (unit, int32) OBus_member.Method.tval m_SetBrightness : (int32, int32) OBus_member.Method.ttype 'a members = {m_GetBrightness : 'a OBus_object.t -> unit -> int32 Lwt.t;m_SetBrightness : 'a OBus_object.t -> int32 -> int32 Lwt.t;}val make : 'a members -> 'a OBus_object.interface