get_cell          193 src/liveedit.cc     get_cell(i1, i2) = value4 | dir;
get_cell          197 src/liveedit.cc     return get_cell(i1, i2) & (kMaxUInt32 ^ kDirectionMask);
get_cell          200 src/liveedit.cc     return static_cast<Direction>(get_cell(i1, i2) & kDirectionMask);