rb_str_drop_bytes  773 include/ruby/intern.h VALUE rb_str_drop_bytes(VALUE, long);
rb_str_drop_bytes 4170 string.c       	rb_str_drop_bytes(str, len);
rb_str_drop_bytes 3788 transcode.c            rb_str_drop_bytes(input, ip - (unsigned char *)RSTRING_PTR(input));