@java.lang.Override
  public final boolean isInitialized() {
    byte isInitialized = memoizedIsInitialized;
    if (isInitialized == 1) return true;
    if (isInitialized == 0) return false;

    memoizedIsInitialized = 1;
    return true;
  }
<pre>
Required. The Cloud KMS resource identifier of the customer managed
encryption key used to protect a resource. Has the form:
`projects/my-project/locations/my-region/keyRings/my-kr/cryptoKeys/my-key`.
The key needs to be in the same region as where the compute resource is
created.
</pre>

<code>string kms_key_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for kmsKeyName.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/EncryptionSpec.java