react-router-ga/example/node_modules/@babel/runtime/helpers/esm/classPrivateFieldSet.js

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export default function _classPrivateFieldSet(receiver, privateMap, value) {
  var descriptor = privateMap.get(receiver);

  if (!descriptor) {
    throw new TypeError("attempted to set private field on non-instance");
  }

  if (descriptor.set) {
    descriptor.set.call(receiver, value);
  } else {
    if (!descriptor.writable) {
      throw new TypeError("attempted to set read only private field");
    }

    descriptor.value = value;
  }

  return value;
}