class Opal::Nodes::KwrestArgNode

def compile
  initialize_kw_args_if_needed
  kwrestarg_name = @sexp[1]
  extract_code = "Opal.kwrestargs($kwargs, #{used_kwargs});"
  # kwrestarg can be blank def m(**) end
  # we need to perform assignment only for named kwrestarg
  if kwrestarg_name
    var_name = variable(kwrestarg_name.to_sym)
    add_temp var_name
    line "#{var_name} = #{extract_code}"
  end
end

def used_kwargs
  args = scope.used_kwargs.map do |arg_name|
    "'#{arg_name}': true"
  end
  "{#{args.join ','}}"
end