<summary>
Maximum amount of expansion to apply to the side of the glyph.
This may vary from 0 to infinity, being zero for fixed-size characters
and connected scripts, and non-zero for discrete scripts, and non-zero
for cursive scripts at expansion points.
</summary>
<summary> Maximum amount of expansion to apply to the side of the glyph. This may vary from 0 to infinity, being zero for fixed-size characters and connected scripts, and non-zero for discrete scripts, and non-zero for cursive scripts at expansion points. </summary>