public Builder setTime(com.google.protobuf.Timestamp.Builder builderForValue) {
        if (timeBuilder_ == null) {
          time_ = builderForValue.build();
        } else {
          timeBuilder_.setMessage(builderForValue.build());
        }
        bitField0_ |= 0x00000001;
        onChanged();
        return this;
      }
<pre>
The timestamp indicating the time the event occurred.
</pre>

<code>.google.protobuf.Timestamp time = 1;</code>
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/Span.java