boxIndexInLeaves  139 Source/core/editing/VisibleUnits.cpp     int boxIndexInLeaves(const InlineTextBox*) const;
boxIndexInLeaves  157 Source/core/editing/VisibleUnits.cpp         boxIndex = boxIndexInLeaves(box) - 1;
boxIndexInLeaves  178 Source/core/editing/VisibleUnits.cpp         nextBoxIndex = boxIndexInLeaves(box) + 1;