title: Drawing shapes on JavaFX canvas
body: <p>Let's say I have some shapes like:</p>
  
  <pre><code>Shape s1 = new Rectangle(10, 10);
  Shape s2 = new Circle(10);
  </code></pre>
  
  <p>etc.
  I would like to draw them on canvas. In Swing it was possible through Graphics2D.draw(Shape shape) method, but I don't see equivalent in JavaFX GraphicsContext. Is there something like this in JavaFX?</p>