B_CLOSED_LATCH
case B_CLOSED_LATCH:
pos = row->fIsExpanded ? B_OPEN_LATCH : B_CLOSED_LATCH;
: B_CLOSED_LATCH, fTargetRow);
: B_CLOSED_LATCH;
: B_CLOSED_LATCH, row);
fTargetRow->fIsExpanded ? B_OPEN_LATCH : B_CLOSED_LATCH,