rb_hash_clear    1633 hash.c             rb_hash_clear(hash);
rb_hash_clear    4312 hash.c             rb_define_method(rb_cHash,"clear", rb_hash_clear, 0);
rb_hash_clear     518 include/ruby/intern.h VALUE rb_hash_clear(VALUE);
rb_hash_clear    2060 vm_eval.c          rb_hash_clear(vars->tbl);