@java.lang.Override
  public java.lang.String getId() {
    java.lang.Object ref = id_;
    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();
      id_ = s;
      return s;
    }
  }
<pre>
Required. Identifier for this set of encryption options. The ID must be
1-63 characters in length. The ID must begin and end with a letter
(regardless of case) or a number, but can contain dashes or underscores in
between.
</pre>

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

@return The id.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Encryption.java