/// Returns true if there is a topline, returns false if not
bool bottomLine(idx_type cell) const;
/// Returns true if there is a topline, returns false if not
/// Returns true if there is a topline, returns false if not
bool bottomLine(idx_type cell) const;
/// Returns true if there is a topline, returns false if not
/// return space occupied by the second horizontal line and
/// interline space above row \p row in pixels
/// return space occupied by the second horizontal line and
/// interline space above row \p row in pixels