utils → lib Relation

File in src/include/utils	Includes file in src/include/lib
catcache.h	ilist.h
elog.h	stringinfo.h
guc_tables.h	ilist.h
json.h	stringinfo.h
jsonb.h	stringinfo.h
pgstat_internal.h	dshash.h
pgstat_internal.h	ilist.h
plancache.h	ilist.h
relmapper.h	stringinfo.h
snapshot.h	pairingheap.h