typedef uint32_t BidirectionalRunIndex; ///< An index into an array of bidirectional info.
typedef uint32_t BidirectionalLineRunIndex; ///< An index into an array of bidirectional line info.
typedef uint32_t LineIndex; ///< An index into an array of lines.
typedef uint32_t BidirectionalRunIndex; ///< An index into an array of bidirectional info.
typedef uint32_t BidirectionalLineRunIndex; ///< An index into an array of bidirectional line info.
typedef uint32_t LineIndex; ///< An index into an array of lines.