anchor.diff:  
   ----
   $ yarn add -D js-given <1>
  -$ npm install --save-dev <2>
  +$ npm install --save-dev js-given<2>
   ----
   <1> With https://yarnpkg.com[Yarn]
   <2> With https://www.npmjs.com/[NPM]
  
positive.code: }
  ----
  
  == Stages and state sharing
  
  **TODO**
  
negative.code: 
  JsGiven needs to be setup in each test source file by calling a setup function.
  
  [NOTE]
  It is necessary to do this in each test source file as some tests frameworks (Jest and probably Ava) actually run each test source file in a worker process in order to get parallel execution of tests.
  
  ==== For Rspec inspired frameworks (Jest, Mocha, Jasmine, Protractor)
  