in correlation/outbound_http.go [19:28]
func (c instrumentedRoundTripper) injectRequest(req *http.Request) {
correlationID := ExtractFromContext(req.Context())
if correlationID != "" {
req.Header.Set(propagationHeader, correlationID)
}
if c.config.clientName != "" {
req.Header.Set(clientNameHeader, c.config.clientName)
}
}