Distributed tracing with TextMapPropagator

Hi,
Is there any way of using tarpc with a [TextMapPropagator](https://docs.rs/opentelemetry/latest/opentelemetry/propagation/text_map_propagator/trait.TextMapPropagator.html) to propagate opentelemetry headers or to extend the tracing context allowing more properties to pass by (with an HashMap for example)?
This would allow custom opentelemetry implementation to work with tarpc (Datadog for example).