@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + HISTOGRAM_QUERY_FIELD_NUMBER;
    hash = (53 * hash) + getHistogramQuery().hashCode();
    if (!internalGetHistogram().getMap().isEmpty()) {
      hash = (37 * hash) + HISTOGRAM_FIELD_NUMBER;
      hash = (53 * hash) + internalGetHistogram().hashCode();
    }
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
A map from the values of the facet associated with distinct values to the
number of matching entries with corresponding value.

The key format is:

* (for string histogram) string values stored in the field.
* (for named numeric bucket) name specified in `bucket()` function, like
  for `bucket(0, MAX, "non-negative")`, the key will be `non-negative`.
* (for anonymous numeric bucket) range formatted as `&lt;low&gt;-&lt;high&gt;`, for
  example, `0-1000`, `MIN-0`, and `0-MAX`.
</pre>

<code>map&lt;string, int64&gt; histogram = 2;</code>
java-talent/proto-google-cloud-talent-v4/src/main/java/com/google/cloud/talent/v4/HistogramQueryResult.java