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