enyojs/layout — pull request #108 by mbessey (2012-12-11 20:49:56+00:00)
Title: Add a "collapsible" Node property

For some Nodes, it doesn't make sense to collapse the node. This is
often true of the top node of a tree, for example. I added a
"collapsible" property which is complementary to the existing "expandable"
property.