rb_cvar_set       958 include/ruby/intern.h void rb_cvar_set(VALUE, ID, VALUE);
rb_cvar_set      2466 object.c           rb_cvar_set(obj, id, val);
rb_cvar_set      2888 variable.c         rb_cvar_set(klass, id, val);
rb_cvar_set      2902 variable.c         rb_cvar_set(klass, id, val);