charlike/templates/node_modules/core-js/modules/_an-instance.js

Small, fast, simple and streaming project scaffolder for myself, but not only. Supports hundreds of template engines through the @JSTransformers API or if you want custom `render` function passed through options

module.exports = function(it, Constructor, name, forbiddenField){
  if(!(it instanceof Constructor) || (forbiddenField !== undefined && forbiddenField in it)){
    throw TypeError(name + ': incorrect invocation!');
  } return it;
};