extending aria plugin

gistfile1.js

instance.plug(A.Plugin.Aria, {
						after: {
							processAttribute: function(event) {
								var instance = this;
								var host = instance.get('host');

								if (event.aria.attrName == 'collapsed') {
									var collapsed = host.get('collapsed');

									if (host.icons) {
										var icons = host.icons;
										var collapseItem = icons.item(COLLAPSE);

										if (collapseItem) {
											instance.setAttribute(
												'aria-pressed',
												collapsed,
												collapseItem.get('boundingBox')
											);
										}
									}

									instance.setAttribute(
										'aria-hidden',
										 collapsed,
										 host.bodyNode
									);

									event.halt(); // halting default setter
								}
							}
						},
						attributes: {
							collapsed: 'aria-hidden'
						}
					});