Parse a CESR stream into a provenance-carrying decomposition. Body decoding
is pluggable: JSON is built in, and other serializations (CBOR/MGPK) are
decoded only when a decoder for their kind is injected via opts.decoders;
an undecoded body is framed with sad=null.
Parse a CESR stream into a provenance-carrying decomposition. Body decoding is pluggable: JSON is built in, and other serializations (CBOR/MGPK) are decoded only when a decoder for their kind is injected via
opts.decoders; an undecoded body is framed with sad=null.