ruby_debug_print_id  130 compile.c         ruby_debug_print_id(1, compile_debug, (header), (id)))
ruby_debug_print_id   22 vm_debug.h     #define dpi(i)   ruby_debug_print_id(-1, 0, "", (i))
ruby_debug_print_id   28 vm_debug.h     ID    ruby_debug_print_id(int level, int debug_level, const char *header, ID id);