rb_sym_to_s       783 include/ruby/intern.h VALUE rb_sym_to_s(VALUE);
rb_sym_to_s      9806 string.c           rb_define_method(rb_cSymbol, "to_s", rb_sym_to_s, 0);
rb_sym_to_s      9807 string.c           rb_define_method(rb_cSymbol, "id2name", rb_sym_to_s, 0);