function filterDuplicates(integrations) {
  const integrationsByName = {};

  integrations.forEach(currentInstance => {
    const { name } = currentInstance;

    const existingInstance = integrationsByName[name];

    // We want integrations later in the array to overwrite earlier ones of the same type, except that we never want a
    // default instance to overwrite an existing user instance
    if (existingInstance && !existingInstance.isDefaultInstance && currentInstance.isDefaultInstance) {
      return;
    }

    integrationsByName[name] = currentInstance;
  });

  return Object.keys(integrationsByName).map(k => integrationsByName[k]);
}
Remove duplicates from the given array, preferring the last instance of any duplicate. Not guaranteed to
preseve the order of integrations in the array.

@private