# File lib/haml/options.rb, line 172
    def initialize(values = {}, &block)
      defaults.each {|k, v| instance_variable_set "@#{k}""@#{k}", v}
      values.reject {|k, v| !defaults.has_key?(k) || v.nil?}.each {|k, v| send("#{k}=", v)}
      yield if block_given?
    end