fnMatchFunction = function (oNode) {
				if (!oNode || !oNode.isArtificial) {
					iNodeCounter++;
				}

				if (oNode) {
					if (oNode.nodeState && oNode.nodeState.selected && !oNode.isArtificial) {
						aResultContexts.push(oNode.context);
						// cache the selected node for subsequent findNode/getContextByIndex calls
						that._aRowIndexMap[iNodeCounter] = oNode;

						return true;
					}
				}

				return false;
			}
Returns an array containing all selected contexts, ordered by their appearance in the
tree.

@return {sap.ui.model.Context[]}
  An array containing the binding contexts for all selected nodes

@private