Opentelemetry.Span_ctx
Span context. This bundles up a trace ID and parent ID.
https://opentelemetry.io/docs/specs/otel/trace/api/#spancontext
val make : trace_id:Trace_id.t -> parent_id:Span_id.t -> unit -> t
val dummy : t
Invalid span context, to be used as a placeholder
val is_valid : t -> bool
val trace_id : t -> Trace_id.t
val is_remote : t -> bool
val to_w3c_trace_context : t -> bytes
val of_w3c_trace_context_exn : bytes -> t