EbeanServer mock = ...; // setup your mock or test double

    MockiEbean.runWithMock(mock, new Runnable() {
      @Override
      public void run() {
        ...
        // any test code in here uses the mock EbeanServer as the default server
      }
    });

    WithStaticFinder with = WithStaticFinder.use(Customer.class, new TDCustFinder());
    try {

      Customer jim = Customer.find.byName("jim");

    } finally {
      with.restoreOriginal();
    }

    DelegateEbeanServer server = new DelegateEbeanServer();
    server.withFinder(Customer.class).as(new TDCustFinder());

    // make TDCustFinder the finder for Customer
    server.beforeRun();
    try {

      // run our test code ... that will use TDCustFinder 
      Customer jim = Customer.find.byName("jim");

    } finally {
      // restore the original finder implementation
      server.afterRun();
    }

  public WithStaticFinder<T> as(Object testDouble) throws FinderFieldNotFoundException {
    try {
      this.testDouble = testDouble;
      this.field = findField();
      this.field.setAccessible(true);
      try {
        Field modifiersField = Field.class.getDeclaredField("modifiers");
        /**
         * If the project using this library has a SecurityManager set up, permission may be denied.
         * Therefor, running this as a privileged action.
         */
        AccessController.doPrivileged((PrivilegedAction<Object>) () -> {
          modifiersField.setAccessible(true);
          return null;
        });
        modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
      } catch (NoSuchFieldException e) {
        // this fails with Java 17
        throw new RuntimeException("Unable to turn off final field flag for " + field, e);
      }

      this.original = field.get(null);
      return this;

    } catch (IllegalAccessException e) {
      throw new RuntimeException(e);
    }
  }