In the line of GDB output below, what do the ampersands following the
h= and v= mean?
(gdb) po [self _subtreeDescription]
[ D A W#] h=--& v=&-- NDView 0x10012fca0 f=(0,113,480,473) b=(-)
=> <CALayer: 0x1001304d0> TIME drawRect: min/mean/max 0.00/0.00/0.00 ms
A=autoresizesSubviews, C=canDrawConcurrently, D=needsDisplay,
F=flipped, G=gstate, H=hidden (h=by ancestor), O=opaque,
P=preservesContentDuringLiveResize, S=scaled/rotated, W=wantsLayer
(w=ancestor wantsLayer), #=has surface
-Michael
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