Small note

Signed-off-by: Bob Weinand <[email protected]>

Author: bwoebi

datadog-trace-utils/src/span/mod.rs

@@ -99,6 +99,7 @@ impl SpanBytes for Bytes {
 /// Trait representing a tuple of (Text, Bytes) types used for different underlying data structures.
 /// Note: The functions are internal to the msgpack decoder and should not be used directly: they're
 /// only exposed here due to the inavailability of min_specialization in stable Rust.
+/// Also note that the Clone and PartialEq bounds are only present for tests.
 pub trait TraceData: Default + Clone + Debug + PartialEq + Serialize {
     type Text: SpanText;
     type Bytes: SpanBytes;