ruby_debug_print_id  109 compile.c         ruby_debug_print_id(1, compile_debug, header, id))
ruby_debug_print_id   20 debug.h        #define dpi(i)   ruby_debug_print_id(-1, 0, "", i)
ruby_debug_print_id   26 debug.h        ID    ruby_debug_print_id(int level, int debug_level, const char *header, ID id);