Custom action example not complete about monogatari HOT 1 OPEN

class MyAction extends Monogatari.Action {

    static matchString ([action]) {
        return action === 'myaction';
    }

    constructor ([myaction, ...args]) {
        super ();
    }
    
    async apply() {
  
    }

    async revert() {
  
    }

    async didApply() {
      return { advance: true };
    }

    async didRevert() {
      return { advance: true, step: true };
    }
}

MyAction.id = 'MyAction';