public com.google.protobuf.Int32ValueOrBuilder getChildSpanCountOrBuilder() {
      if (childSpanCountBuilder_ != null) {
        return childSpanCountBuilder_.getMessageOrBuilder();
      } else {
        return childSpanCount_ == null
            ? com.google.protobuf.Int32Value.getDefaultInstance()
            : childSpanCount_;
      }
    }
<pre>
Optional. The number of child spans that were generated while this span
was active. If set, allows implementation to detect missing child spans.
</pre>

<code>
.google.protobuf.Int32Value child_span_count = 13 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/Span.java