@java.lang.Override
        public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
          return super.clearOneof(oneof);
        }
<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