hb_ot_layout_language_get_required_feature

function hb_ot_layout_language_get_required_feature(

  face: Phb_face_t;

  table_tag: Thb_tag_t;

  script_index: guint;

  language_index: guint;

  feature_index: Pguint;

  feature_tag: Phb_tag_t

):Thb_bool_t;