# File lib/mocha/mock.rb, line 73
73:     def stubs(method_name_or_hash, backtrace = nil)
74:       iterator = ArgumentIterator.new(method_name_or_hash)
75:       iterator.each { |*args|
76:         method_name = args.shift
77:         ensure_method_not_already_defined(method_name)
78:         expectation = Expectation.new(self, method_name, backtrace)
79:         expectation.at_least(0)
80:         expectation.returns(args.shift) if args.length > 0
81:         @expectations.add(expectation)
82:       }
83:     end