Function allsorts::gsub::get_lookups_cache_index
source ยท pub fn get_lookups_cache_index(
gsub_cache: &LayoutCache<GSUB>,
script_tag: u32,
opt_lang_tag: Option<u32>,
feature_variations: Option<&FeatureTableSubstitution<'_>>,
feature_mask: FeatureMask,
) -> Result<usize, ParseError>