cation. Centered by default if size is specified, also can be set in CSS with negative margins.</td>
	</tr>
	<tr>
<td><code><b>shadowUrl</b></code></td>
<td><code>String</code>
<td>The URL to the icon shadow image. If not specified, no shadow image will be created.</td>
	</tr>
	<tr>
<td><code><b>shadowRetinaUrl</b></code></td>
<td><code>String</code>
<td>The URL to the retina sized version of the icon shadow image. If not specified, no shadow image will be created. Used for Retina screen devices.<