libjsonm-ocaml-dev 1.0.2-2 (amd64 binary) in ubuntu mantic

 Jsonm is an OCaml non-blocking streaming codec to decode and encode the
 JSON data format. It can process JSON text without blocking on IO and
 without a complete in-memory representation of the data.
 .
 The uncut codec also processes whitespace and (non-standard) JSON with
 JavaScript comments.
 .
 This package contains the development modules you need to use Jsonm
 in your programs.