Email to cocoa-dev:
I found a simple solution to uncollapsing split view items no matter how they
were collapsed.
After I click a toggle button in my application to toggle the 'collapsed'
property of the bottom split view item to true and it collapses, its
'collapsed' property is true
I am having difficulty setting up NSSplitViewController and NSSplitViewItem,
introduced in OS X 10.10 Yosemite.
Specifically, the 'collapsed' property of NSSplitViewItem does not return true
after the bottom split view item of my horizontal split view collapses. I have
set the 'canCollapse'
