code: function unherit(Super) {
    var result
    var key
    var value
  
    inherits(Of, Super)
    inherits(From, Of)
  
    /* Clone values. */
    result = Of.prototype
  
    for (key in result) {
      value = result[key]
  
      if (value && typeof value === 'object') {
        result[key] = 'concat' in value ? value.concat() : xtend(value)
      }
    }
  
    return Of
  
    /* Constructor accepting a single argument,
     * which itself is an `arguments` object. */
    function From(parameters) {
      return Super.apply(this, parameters)
    }
  
    /* Constructor accepting variadic arguments. */
    function Of() {
      if (!(this instanceof Of)) {
        return new From(arguments)
      }
  
      return Super.apply(this, arguments)
    }
  }
docs: /* Create a custom constructor which can be modified
  without affecting the original class.