# File lib/rspec/mocks/any_instance/recorder.rb, line 66
        def unstub(method_name)
          unless @observed_methods.include?(method_name.to_sym)
            raise RSpec::Mocks::MockExpectationError, "The method `#{method_name}` was not stubbed or was already unstubbed"
          end
          message_chains.remove_stub_chains_for!(method_name)
          stop_observing!(method_name) unless message_chains.has_expectation?(method_name)
        end