LookupSubTable   1361 third_party/harfbuzz-ng/src/hb-ot-layout-gpos-table.hh   typedef struct PosLookupSubTable LookupSubTable;
LookupSubTable    902 third_party/harfbuzz-ng/src/hb-ot-layout-gsub-table.hh   typedef struct SubstLookupSubTable LookupSubTable;