code: public java.util.Map<java.lang.String, java.lang.Long> getTotalBytesOnTiersMap() {
      return internalGetTotalBytesOnTiers().getMap();
    }
docs: <pre>
  * the map of total bytes on each tier
  </pre>
  
  <code>map&lt;string, int64&gt; totalBytesOnTiers = 3;</code>