Batrpc_otelmodule Otel = Opentelemetrytype header = Batrpc.Meta.headerval get_span_ctx : header list -> Otel.Span_ctx.t optionGet a span context
val header_span_ctx : Otel.Span_ctx.t -> headerMake a header for this span context
val k_span_ctx : Otel.Span_ctx.t Hmap.keyKey for trace context. The middleware will set this key if an incoming span context was parsed.
module Server : sig ... end