About diagram.select function

I want to usage diagram.select api at once selection two or more node, But this function just only can selection one node.

Who can help me please. Thanks every one.

Have you read http://gojs.net/latest/intro/selection.html ?

I has been read the web page, But no any help

Thanks, I think i find to fix this problem’s way. Usage diagram.selectCollection api can selection more node