code: public void fillText(String text, double x, double y) {
  		this.gc.fillText(text, doc2fxX(x), doc2fxY(y));
  	}
docs: Fills the given string of text at position x, y
  with the current fill paint attribute.
  A {@code null} text value will be ignored.
  
  <p>This method will be affected by any of the
  global common, fill, or text
  attributes as specified in the
  Rendering Attributes Table of {@link GraphicsContext}.
  
  @param text the string of text or null.
  @param x position on the x axis.
  @param y position on the y axis.