stubs (Mocha::Mock)

        # File lib/mocha/mock.rb, line 73
    73:     def stubs(method_name_or_hash, backtrace = nil)
    74:       if method_name_or_hash.is_a?(Hash) then
    75:         method_name_or_hash.each do |method_name, return_value|
    76:           ensure_method_not_already_defined(method_name)
    77:           @expectations.add(Expectation.new(self, method_name, backtrace).at_least(0).returns(return_value))
    78:         end
    79:       else
    80:         ensure_method_not_already_defined(method_name_or_hash)
    81:         @expectations.add(Expectation.new(self, method_name_or_hash, backtrace).at_least(0))
    82:       end
    83:     end