text: class ProblemJson {
  
      #type = "";
      #title = "";
      #detail = "";
      #instance = "";
  
      constructor(type, title, detail, instance) {
          this.#type = type;
          this.#title = title
          this.#detail = detail
          this.#instance = instance
      }
  
      get type() {
          return this.#type;
      }
  
      get title() {
          return this.#title;
      }
  
      get detail() {
          return this.#detail;
      }
  
      get instance() {
          return this.#instance;
      }
  
      toJson = () => {
          return {
              type: this.#type,
              title: this.#title,
              detail: this.#detail,
              instance: this.#instance
          }
      }
  }
  
  module.exports = ProblemJson
  