class Sass::Tree::Visitors::SetOptions

def visit_mixin(node)
  node.args.each {|a| a.options = @options}
  node.keywords.each {|_k, v| v.options = @options}
  node.splat.options = @options if node.splat
  node.kwarg_splat.options = @options if node.kwarg_splat
  yield
end