# File lib/sass/tree/visitors/convert.rb, line 116
  def visit_function(node)
    args = node.args.map do |v, d|
      d ? "#{v.to_sass(@options)}: #{d.to_sass(@options)}" : v.to_sass(@options)
    end.join(", ")
    if node.splat
      args << ", " unless node.args.empty?
      args << node.splat.to_sass(@options) << "..."
    end

    "#{tab_str}@function #{dasherize(node.name)}(#{args})#{yield}"
  end