code: function resolve (resolve) {
      if (defined(resolve)) {
          // set default
          immutable.defaultResolve = resolve ? true : false
          // return immutable
          return ImmutableCore
      }
      // return default value
      return immutable.defaultResolve
  }
docs: @function resolve
  
  get/set the default resolve option
  
  @param {boolean} resolve
  
  @returns {ImmutableCore|boolean}