# Variables
B3Egress is a propagation.HTTPFormat that reads both TraceContext and B3 tracing formats, preferring TraceContext.
TraceContextB3Egress is a propagation.HTTPFormat that reads both TraceContext and B3 tracing formats, preferring TraceContext.
TraceContextEgress is a propagation.HTTPFormat that reads both TraceContext and B3 tracing formats, preferring TraceContext.