rb_hash_tbl       847 ext/objspace/objspace.c     st_foreach(rb_hash_tbl(category_objects), collect_values, ary);
rb_hash_tbl       524 include/ruby/intern.h struct st_table *rb_hash_tbl(VALUE);
rb_hash_tbl      1048 include/ruby/ruby.h #define RHASH_TBL(h) rb_hash_tbl(h)