text: const addons_helloworld = require('./build/Release/helloworld.node');
  console.log(addons_helloworld.helloworld());
  
  const addons_function_arg = require('./build/Release/function_arg.node');
  console.log(addons_function_arg.add(3, 4))
  
  const addons_callback = require('./build/Release/callback.node');
  addons_callback((msg) => {
      console.log('result:', msg);
  })
  
  const addons_object_factory = require('./build/Release/object_factory.node');
  var aObj = addons_object_factory('Yo! bro.');
  var bObj = addons_object_factory('Sup!');
  console.log('result:', aObj.msgKey + ' ---> ' + bObj.msgKey);
  
  const addons_function_factory = require('./build/Release/function_factory.node');
  var func = addons_function_factory();
  console.log('result:', func());
  
  const addons_object_wrap = require('./build/Release/object_wrap.node');
  var obj = new addons_object_wrap.object_wrap(10);
  console.log( obj.plusOne() ); // 11
  console.log( obj.plusOne() ); // 12
  console.log( obj.plusOne() ); // 13
  
  console.log( obj.multiply().value() ); // 13
  console.log( obj.multiply(10).value() ); // 130
  
  var newobj = obj.multiply(-1);
  console.log( newobj.value() ); // -13
  console.log( obj === newobj ); // false