-

[3] pry(#<Autopass::EntryCache>)> show-source @entries.first.eql?

From: object.c (C Method):
Owner: Kernel
Visibility: public
Number of lines: 6

VALUE
rb_obj_equal(VALUE obj1, VALUE obj2)
{
    if (obj1 == obj2) return Qtrue;
    return Qfalse;
}