lang_compare_first_component  827 third_party/harfbuzz-ng/src/hb-ot-tag.cc 				  (hb_compare_func_t) lang_compare_first_component);
lang_compare_first_component  832 third_party/harfbuzz-ng/src/hb-ot-tag.cc   if (0 == lang_compare_first_component (lang_str, "zh"))