@java.lang.Override
    public int getKindValue() {
      return kind_;
    }
<pre>
Distinguishes between spans generated in a particular context. For example,
two spans with the same name may be distinguished using `RPC_CLIENT`
and `RPC_SERVER` to identify queueing latency associated with the span.
</pre>

<code>.google.devtools.cloudtrace.v1.TraceSpan.SpanKind kind = 2;</code>

@return The enum numeric value on the wire for kind.
java-trace/proto-google-cloud-trace-v1/src/main/java/com/google/devtools/cloudtrace/v1/TraceSpan.java