src/js/libs/spiritual-gui.js
function(node) {
			node = node instanceof gui.Spirit ? node.element : node;
			return this.contains(node.ownerDocument, node);
		}
function(node) {
			node = node instanceof gui.Spirit ? node.element : node;
			return this.contains(node.ownerDocument, node);
		}
function ( node ) { node = node instanceof gui . Spirit ? node . element : node ; return this . contains ( node . ownerDocument , node ) ; }
Is node positioned in page DOM?
@param {Element|gui.Spirit} node
@returns {boolean}
Is node positioned in page DOM?