MyCSS_PROPERTY_STROKE_LINECAP_SQUARE

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_STROKE_LINECAP_SQUARE = mycss_property_stroke_linecap.MyCSS_PROPERTY_STROKE_LINECAP_SQUARE;

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