mocktracer/mockspan.go
func (s *MockSpan) SetBaggageItem(key, val string) opentracing.Span {
	s.Lock()
	defer s.Unlock()
	s.SpanContext = s.SpanContext.WithBaggageItem(key, val)
	return s
}
func (s *MockSpan) SetBaggageItem(key, val string) opentracing.Span {
	s.Lock()
	defer s.Unlock()
	s.SpanContext = s.SpanContext.WithBaggageItem(key, val)
	return s
}
func ( s * MockSpan ) SetBaggageItem ( key , val string ) opentracing . Span { s . Lock ( ) defer s . Unlock ( ) s . SpanContext = s . SpanContext . WithBaggageItem ( key , val ) return s }
// SetBaggageItem belongs to the Span interface
SetBaggageItem belongs to the Span interface