zes in pixels, negative values indicate relative weights for resizing. The size of this vector must always match the number of elements (children).</description></td></tr><tr><td valign="top" class="PROPERTYTABLE"><code>Spacing&nbsp;</code></td><td valign="top" class="PROPERTYTABLE"><value>positive integer</value></td><td valign="top" class="PROPERTYTABLE"><description>Number of pixels of extra space to leave between elements in the layout.</description></td></tr><tr><td valign="top" class="PROPERTYTABLE"><