class Haml::Options

def initialize(values = {}, &block)

def initialize(values = {}, &block)
  defaults.each {|k, v| instance_variable_set :"@#{k}", v}
  values.reject {|k, v| !defaults.has_key?(k) || v.nil?}.each {|k, v| send("#{k}=", v)}
  yield if block_given?
end