export const L5D_TRACE_HDR = 'l5d-ctx-trace' ; const B3Prefix = 'x-b3' ; export const ZipkinHeaders = { TraceId : `${ B3Prefix }-traceid` , SpanId : `${ B3Prefix }-spanid` , ParentId : `${ B3Prefix }-parentspanid` , Sampled : `${ B3Prefix }-sampled` , Flags : `${ B3Prefix }-flags` , } ;