text: module.exports = class Namahamu {
    constructor(obj) {
      this.namahamu = obj;
      return this.namahamu;
    }
  
    get namahamu() {
      return this.instance;
    }
  
    set namahamu(obj) {
      this.instance = {
        bookTitle: obj.bookTitle || null,
        circleName: obj.circleName || null,
        artistNames: obj.artistNames || [],
        genres: obj.genres || [],
        publishDate: obj.publishDate || '1970/01/01',
        bookSize: obj.bookSize || null,
        pageNumber: obj.pageNumber || 0,
      };
    }
  };
  