- Allow multiple Middle and Terminal funcs, the same way we do with AsStart and MultiStartProvider
- Detect cycles (optional)
- Allow passing per-stage and per-instance options (e.b. buffer size for each concrete stage)
- Register: error if registering an existing configuration type. Suggest e.g using typedefs for same underlying type
- Instantiation: check if instanceID is duplicate
- optimization: if many destinations share the same codec, instantiate it only once
- Don't force
Enablerinterface to be implemented as the same type of the struct field. Look for pointer and value receivers indistinctly.
- Way of propagating errors