--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Specifies middleware to use in a stack.
- !ruby/struct:SM::Flow::VERB 
  body: "  class Middleware\n    def initialize(app)\n      @app = app\n    end\n\n    def call(env)\n      env["rack.some_header"] = "setting an example"\n      @app.call(env)\n    end\n  end\n\n  use Middleware\n  run lambda { |env| [200, { "Content-Type" => "text/plain" }, ["OK"]] }\n"
- !ruby/struct:SM::Flow::P 
  body: All requests through to this application will first be processed by the middleware class. The <tt>call</tt> method in this example sets an additional environment key which then can be referenced in the application if required.
full_name: Rack::Builder#use
is_singleton: false
name: use
params: (middleware, *args, &block)
visibility: public