Runtime code reflection in Elixir

How do one extract the ast of a module, function.. in runtime in elixir ?

Is there a way to do this in elixir ?

defmoudle Car do
  def beep do
    :beep  
  end
end

iex > Car."way to get the ast of the 'beep' function"
{:def, [context: Elixir, import: Kernel],
 [{:beep, [context: ...], ...}, [do: :beep]]}