rb_ary_at        5652 array.c            self = rb_ary_at(self, *argv);
rb_ary_at        6075 array.c            rb_define_method(rb_cArray, "at", rb_ary_at, 1);
rb_ary_at         837 internal.h     VALUE rb_ary_at(VALUE, VALUE);
rb_ary_at        3197 object.c       		    obj = rb_ary_at(obj, *argv);