@java.lang.Override
    public long getFirstValue() {
      return firstValue_;
    }
<pre>
The offset of the first entry in the encoded data, or, if only a single
integer was encoded, that single integer's value. If the field is empty or
missing, assume zero.
</pre>

<code>int64 first_value = 1;</code>

@return The firstValue.
java-webrisk/proto-google-cloud-webrisk-v1beta1/src/main/java/com/google/webrisk/v1beta1/RiceDeltaEncoding.java