I recently implemented restart-frame support in a client and noticed that some debug adapters (e.g. java-debug) support restart on a frame that is missing the canRestart property. Based on the specification I'd have assumed that absence of the property is the same as false.

  /**
   * Indicates whether this frame can be restarted with the `restart` request.
   * Clients should only use this if the debug adapter supports the `restart`
   * request and the corresponding capability `supportsRestartRequest` is true.
   */
  canRestart?: boolean;

My question is, is java-debug supposed to set canRestart to true if it is supported, or is the absence of the property supposed to imply it's supported if supportsRestartRequest is set?