only-changed-jest-watch-plugin/example/node_modules/core-js/modules/_an-instance.js

Jest watch plugin for running either only the modified test (for TDD), or tests of dependant modules

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