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Ok so I was doing very similar. In this scenario response is of type `Interceptor` so it might look like:
```ts
cy.wait("@getSomething").then(interceptor => {
  expect(interceptor.response?.statusCode).to.be.eq(200);
  expect(interceptor.response?.body.data.package.insert.errors).to.have.length(0);
}
``` 
I noticed however that using the `its().should()` alternative meant I wasn't dealing with a potentially undefined value `interceptor.response` so I wasn't sure if I was handling it correctly.