code: public static <U> WithStaticFinder<U> use(Class<U> cls, Object testFinder) {
  
      WithStaticFinder<U> with = new WithStaticFinder<>(cls);
      with.as(testFinder);
      with.useTestDouble();
      return with;
    }
docs: Set the given test double onto the given class returning the WithStaticFinder.
  <p>
  Use restore to put the original finder back onto the class.
  </p>
  
  <pre>{@code
  
  // Replace the finder with TDCustFinder
  WithStaticFinder with = WithStaticFinder.use(Customer.class, new TDCustFinder());
  try {
  // perform some test
  Customer jim = Customer.find.byName("jim");
  
  } finally {
  // restore the original finder
  with.restoreOriginal();
  }
  
  }</pre>