# File lib/rspec/mocks/syntax.rb, line 109
      def self.enable_expect(syntax_host = ::RSpec::Mocks::ExampleMethods)
        return if expect_enabled?(syntax_host)

        syntax_host.class_eval do
          def receive(method_name, &block)
            Matchers::Receive.new(method_name, block)
          end

          def allow(target)
            AllowanceTarget.new(target)
          end

          def expect_any_instance_of(klass)
            AnyInstanceExpectationTarget.new(klass)
          end

          def allow_any_instance_of(klass)
            AnyInstanceAllowanceTarget.new(klass)
          end
        end

        RSpec::Mocks::ExampleMethods::ExpectHost.class_eval do
          def expect(target)
            ExpectationTarget.new(target)
          end
        end
      end