var golang.org/x/net/trace.contextKey

3 uses

	golang.org/x/net/trace (current package)
		trace.go#L137: 	return context.WithValue(ctx, contextKey, tr)
		trace.go#L142: 	tr, ok = ctx.Value(contextKey).(Trace)
		trace.go#L314: var contextKey = contextKeyT("golang.org/x/net/trace.Trace")