title: How do you programatically change the source of an image whose name is ambiguous?
body: <p>How do you say or achieve container.child.source = image.png?</p>
  
  <p>I have a hexagon map built by specifying width and height.  I draw a wireframe and place a base image for each hex into a canvas.  Next, the canvas listens for a mouse click.  I then run a calculation to determine which hex the mouse click was closest to.  My intent is to change the source of the image that the user clicked on.  </p>
  
  <p>I know that mapSlate.getChildByName(mapProperties[closestHex]['baseName']) is the intended hex but I can't quite get to the point of doing a .source as Flex doesn't know that the selected object is an image.  </p>