rb_hash_rehash   1697 compile.c      			    rb_hash_rehash(map);
rb_hash_rehash   7944 compile.c          rb_hash_rehash(obj);
rb_hash_rehash   1597 hash.c         	    rb_hash_rehash(hash);
rb_hash_rehash   2629 hash.c             rb_hash_rehash(hash);
rb_hash_rehash   4268 hash.c             rb_define_method(rb_cHash,"rehash", rb_hash_rehash, 0);