public com.google.protobuf.Duration getAutoDeleteTtl() {
    if (ttlCase_ == 3) {
      return (com.google.protobuf.Duration) ttl_;
    }
    return com.google.protobuf.Duration.getDefaultInstance();
  }
public com . google . protobuf . Duration getAutoDeleteTtl ( ) { if ( ttlCase_ == 3 ) { return ( com . google . protobuf . Duration ) ttl_ ; } return com . google . protobuf . Duration . getDefaultInstance ( ) ; }
<pre>
Optional. The lifetime duration of cluster. The cluster will be
auto-deleted at the end of this period. Valid range: **[10m, 14d]**.
Example: **"1d"**, to delete the cluster 1 day after its creation..
</pre>

<code>.google.protobuf.Duration auto_delete_ttl = 3;</code>