public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
          return com.google.devtools.cloudtrace.v2.TraceProto
              .internal_static_google_devtools_cloudtrace_v2_Span_TimeEvent_Annotation_descriptor;
        }
<pre>
Text annotation with a set of attributes.
</pre>

Protobuf type {@code google.devtools.cloudtrace.v2.Span.TimeEvent.Annotation}
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/Span.java