MyCSS_PROPERTY_GLYPH_ORIENTATION_VERTICAL_AUTO

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C)
enum MyCSS_PROPERTY_GLYPH_ORIENTATION_VERTICAL_AUTO = mycss_property_glyph_orientation_vertical.MyCSS_PROPERTY_GLYPH_ORIENTATION_VERTICAL_AUTO;

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