code: function _hasOwnProperty(obj) {
      var key;
      for (key in obj) {
          if (obj.hasOwnProperty(key)) {
              return true;
          }
      }
  
      return false;
  }
docs: Check whether given argument has own property
  @param {Object} obj - Target for checking
  @returns {boolean} - whether given argument has own property
  @memberof tui.util
  @private