A manager of channels belonging to a client
Obtains a channel from Discord, or the channel cache if it's already available.
Resolves a data entry to a data Object.
ReturnsAn instance from this Manager
|idOrInstance||Holds||No||The id or instance of something in this Manager|
Resolves a data entry to an instance id.
|idOrInstance||Key | Holds||No||The id or instance of something in this Manager|