Find returns the CodeGeneratorRequest message for the given ID, suitable for capnp.Unmarshal, or nil if the ID was not found.

IsNotFound reports whether e indicates a failure to find a schema.

Register is called by generated code to associate a blob of zlib- compressed, packed Cap'n Proto data for a CodeGeneratorRequest with the IDs it contains.

DefaultRegistry is the process-wide registry used by Register and Find.

A Registry is a mapping of IDs to schema blobs.

A Schema is a collection of schema nodes parsed by the capnp tool.