@java.lang.Override
  public boolean containsEngineConfigs(java.lang.String key) {
    if (key == null) {
      throw new NullPointerException("map key");
    }
    return internalGetEngineConfigs().getMap().containsKey(key);
  }
<pre>
Optional. User-provided engine configurations for the instance.
</pre>

<code>map&lt;string, string&gt; engine_configs = 16 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/Instance.java