public int getHistogramCount() {
    return internalGetHistogram().getMap().size();
  }
<pre>
Requested histogram expression.
</pre>

<code>string histogram_query = 1;</code>

@return The bytes for histogramQuery.
java-talent/proto-google-cloud-talent-v4/src/main/java/com/google/cloud/talent/v4/HistogramQueryResult.java