Hide or show the nodes:
					Try: [ Hide the nodes which be selected ]
					    [ Show all of the nodes which be hidden ]
					
						- Total nodes which 'isHidden' attribute is true: 
 
						- Total hidden nodes: 
 
						- Total check nodes: 
							  Total uncheck nodes: 
 
						- After hide nodes, you can see the 'isFirstNode' and 'isLastNode' attributes on the nodes which still be shown.