code: public boolean containsCapacityBytesOnTiers(
        java.lang.String key) {
      if (key == null) { throw new java.lang.NullPointerException(); }
      return internalGetCapacityBytesOnTiers().getMap().containsKey(key);
    }
docs: <code>map&lt;string, int64&gt; capacityBytesOnTiers = 8;</code>