Registers the envelope summarisers in the global format context (the
reference's bc_envelope::register_tags()): after this call known
values, functions, parameters, requests, responses and events print by
name. Idempotent: the second call does nothing.
Registers the envelope summarisers in the global format context (the reference's
bc_envelope::register_tags()): after this call known values, functions, parameters, requests, responses and events print by name. Idempotent: the second call does nothing.