The localized-display descriptor for a canonical built-in style name, or null for a custom / non-built-in name (render its raw name unchanged).
null
The canonical IStyle.BuiltInName remains the API/storage identity; this only maps it to a display string. Headings and accent tints compose via ICU params (Heading {n}, {pct}% - Accent{n}) so each locale ships one template.
Heading {n}
{pct}% - Accent{n}
The localized-display descriptor for a canonical built-in style name, or
nullfor a custom / non-built-in name (render its raw name unchanged).