class Haml::Buffer

def attributes(class_id, obj_ref, *attributes_hashes)
  attributes = class_id
  attributes_hashes.each do |old|
    self.class.merge_attrs(attributes, Hash[old.map {|k, v| [k.to_s, v]}])
  end
  self.class.merge_attrs(attributes, parse_object_ref(obj_ref)) if obj_ref
  Compiler.build_attributes(
    html?, @options[:attr_wrapper], @options[:escape_attrs], @options[:hyphenate_data_attrs], attributes)
end