boot_defclass    2481 object.c           rb_cBasicObject = boot_defclass("BasicObject", 0);
boot_defclass    2482 object.c           rb_cObject = boot_defclass("Object", rb_cBasicObject);
boot_defclass    2483 object.c           rb_cModule = boot_defclass("Module", rb_cObject);
boot_defclass    2484 object.c           rb_cClass =  boot_defclass("Class",  rb_cModule);