+ * @brief Retrieves the start index of laid-out glyphs.
+ *
+ * @return The start index of laid-out glyphs.
+ */
+ virtual GlyphIndex GetStartIndexOfElidedGlyphs() const = 0;
+
+ /**
+ * @brief Retrieves the end index of laid-out glyphs.
+ *
+ * @return The end index of laid-out glyphs.
+ */
+ virtual GlyphIndex GetEndIndexOfElidedGlyphs() const = 0;
+
+ /**
+ * @brief Retrieves the first middle index of elided glyphs, index before ellipsis of middle.
+ *
+ * @return The first middle index of elided glyphs, index before ellipsis of middle.
+ */
+ virtual GlyphIndex GetFirstMiddleIndexOfElidedGlyphs() const = 0;
+
+ /**
+ * @brief Retrieves the second middle index of elided glyphs, index of ellipsis of middle.
+ *
+ * @return The second middle index of elided glyphs, index of ellipsis of middle.
+ */
+ virtual GlyphIndex GetSecondMiddleIndexOfElidedGlyphs() const = 0;
+
+ /**