build(app = nil, &block) public

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# File actionpack/lib/action_dispatch/middleware/stack.rb, line 165 def build(app = nil, &block) instrumenting = ActiveSupport::Notifications.notifier.listening?(InstrumentationProxy::EVENT_NAME) middlewares.freeze.reverse.inject(app || block) do |a, e| if instrumenting e.build_instrumented(a) else e.build(a) end end end
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