public boolean containsAvailableZones(java.lang.String key) {
    if (key == null) {
      throw new java.lang.NullPointerException();
    }
    return internalGetAvailableZones().getMap().containsKey(key);
  }
public boolean containsAvailableZones ( java . lang . String key ) { if ( key == null ) { throw new java . lang . NullPointerException ( ) ; } return internalGetAvailableZones ( ) . getMap ( ) . containsKey ( key ) ; }
<pre>
Output only. The set of available zones in the location. The map is keyed
by the lowercase ID of each zone, as defined by GCE. These keys can be
specified in `location_id` or `alternative_location_id` fields when
creating a Redis instance.
</pre>

<code>map&lt;string, .google.cloud.redis.v1.ZoneMetadata&gt; available_zones = 1;</code>