Function allsorts_no_std::gsub::gsub_feature_would_apply

pub fn gsub_feature_would_apply<T: GlyphData>(
    gsub_cache: &LayoutCache<GSUB>, 
    gsub_table: &LayoutTable<GSUB>, 
    opt_gdef_table: Option<&GDEFTable>, 
    langsys: &LangSys, 
    feature_tag: u32, 
    glyphs: &[RawGlyph<T>], 
    i: usize
) -> Result<bool, ParseError>