private void buildPartial0(
            com.google.devtools.cloudtrace.v2.Span.TimeEvent.Annotation result) {
          int from_bitField0_ = bitField0_;
          int to_bitField0_ = 0;
          if (((from_bitField0_ & 0x00000001) != 0)) {
            result.description_ =
                descriptionBuilder_ == null ? description_ : descriptionBuilder_.build();
            to_bitField0_ |= 0x00000001;
          }
          if (((from_bitField0_ & 0x00000002) != 0)) {
            result.attributes_ =
                attributesBuilder_ == null ? attributes_ : attributesBuilder_.build();
            to_bitField0_ |= 0x00000002;
          }
          result.bitField0_ |= to_bitField0_;
        }
<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