How to use the testdouble/dist/testdouble.object function in testdouble

}
    };

    fakeTokenizationPayload = {
      payment_source: {
        card: {
          last_digits: '1111',
          card_type:   'VISA'
        }
      },
      links: []
    };
    btClientCreate = td.replace(btClient, 'create');
    contingencyFlowStart = td.replace(contingencyFlow, 'start');

    fakeHostedFieldsInstance = td.object([ 'tokenize' ]);
    td.when(fakeHostedFieldsInstance.tokenize(td.matchers.isA(Object))).thenResolve(fakeTokenizationPayload);
    hostedFieldsCreate = td.replace(hostedFields, 'create');

    fakeBtClient = {
      getConfiguration: (conf) => conf
    };

    td.when(hostedFieldsCreate(td.matchers.isA(Object))).thenResolve(fakeHostedFieldsInstance);
    td.when(btClientCreate(td.matchers.isA(Object))).thenResolve(fakeBtClient);

    const button = document.createElement('button');
    button.id = 'button';

    // $FlowFixMe
    document.body.appendChild(button);
  });

beforeEach(() => {
        client = window.paypal.client({
            env:  'production',
            auth: {
                production: 'PROD'
            }
        });
        btClientCreate = td.replace(btClient, 'create');

        fakeHostedFieldsInstance = td.object([ 'tokenize' ]);
        hostedFieldsCreate = td.replace(hostedFields, 'create');

        fakeBtClient = {
            getConfiguration: (conf) => conf
        };

        td.when(hostedFieldsCreate(td.matchers.isA(Object))).thenResolve(fakeHostedFieldsInstance);
        td.when(btClientCreate(td.matchers.isA(Object))).thenResolve(fakeBtClient);
    });