my-idlers/node_modules/@babel/runtime/helpers/classExtractFieldDescriptor.js

function _classExtractFieldDescriptor(receiver, privateMap, action) {
  if (!privateMap.has(receiver)) {
    throw new TypeError("attempted to " + action + " private field on non-instance");
  }

  return privateMap.get(receiver);
}

module.exports = _classExtractFieldDescriptor, module.exports.__esModule = true, module.exports["default"] = module.exports;