babel-preset-test-bundled-dependencies/node_modules/core-js/modules/_collection-to-json.js

Allow custom config for create-react-app without ejecting

// https://github.com/DavidBruant/Map-Set.prototype.toJSON
var classof = require('./_classof')
  , from    = require('./_array-from-iterable');
module.exports = function(NAME){
  return function toJSON(){
    if(classof(this) != NAME)throw TypeError(NAME + "#toJSON isn't generic");
    return from(this);
  };
};