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class JSDocInfo {
  /**
   * Returns the types specified by the {@code @implements} annotation.
   *
   * @return An immutable list of JSTypeExpression objects that can
   *    be resolved to types.
   */
  public List<JSTypeExpression> getImplementedInterfaces() {
    if (info == null || info.implementedInterfaces == null) {
      return ImmutableList.of();
    }
    return Collections.unmodifiableList(info.implementedInterfaces);
  }

}