@java.lang.Override
  public java.lang.String getKmsKeyName() {
    java.lang.Object ref = kmsKeyName_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      kmsKeyName_ = s;
      return s;
    }
  }
<pre>
Output only. The [KMS key
name](https://cloud.google.com/kms/docs/resource-hierarchy#keys) with which
the content of the ClassItem is encrypted. The expected format is
`projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}`.
</pre>

<code>
string kms_key_name = 6 [(.google.api.field_behavior) = OUTPUT_ONLY, (.google.api.resource_reference) = { ... }
</code>

@return The kmsKeyName.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/CustomClass.java