# File lib/sass/environment.rb, line 88
    def initialize(parent = nil, options = nil)
      @parent = parent
      @options = options || (parent && parent.options) || {}
      @stack = @parent.nil? ? Sass::Stack.new : nil
      @caller = nil
      @content = nil
      @filename = nil
      @functions = nil
      @mixins = nil
      @selector = nil
      @vars = nil
    end