Allows the delegate to determine whether the user can collapse and uncollapse subview.
Original signature is '- (BOOL)splitView:(NSSplitView *)splitView canCollapseSubview:(NSView *)subview'
Available in Mac OS X v10.0 and later.

C# | Visual Basic | Visual C++ |
public bool SplitViewCanCollapseSubviewMessage( NSSplitView splitView, NSView subview )
Public Function SplitViewCanCollapseSubviewMessage ( _ splitView As NSSplitView, _ subview As NSView _ ) As Boolean
public: bool SplitViewCanCollapseSubviewMessage( NSSplitView^ splitView, NSView^ subview )

- splitView (NSSplitView)
- The split view that sent the message.
- subview (NSView)
- The subview to collapse.

YES if subview should collapse when the user drags a divider beyond the halfway mark between its minimum size and its edge, otherwise NO.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)