@java.lang.Override
  public com.google.protobuf.ByteString getSlateIdBytes() {
    java.lang.Object ref = slateId_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      slateId_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }
<pre>
Required. The unique identifier for the slate.
This value should conform to RFC-1034, which restricts to
lower-case letters, numbers, and hyphen, with the first character a
letter, the last a letter or a number, and a 63 character maximum.
</pre>

<code>string slate_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for slateId.
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/CreateSlateRequest.java