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kotlinlang

hello, any idea how to verify JSON response from WebTestClient to check if fields are null? e.g.
```testClient.get()
    .uri("whatever")
    .accept(APPLICATION_JSON)
    .exchange()
    .expectStatus().isOk
    .expectBody()
    .jsonPath("$.whatever").isEqualTo(null) // NULLABILITY_MISMATCH_BASED_ON_JAVA_ANNOTATIONS```
If I enable `jsr305=strict` compiler settings the above fails complaining it expects non-null `Any`

using
• SpringBoot 2.2.1.RELEASE
• Kotlin 1.3.50

using Hamcrest `IsNull.nullValue` I'm getting `expected:&lt;null&gt; but was:&lt;null&gt;`

weird part is that `isEqualTo` ends up calling
```public void assertValue(String content, @Nullable Object expectedValue)```
which allows nullable value

if anyone is also looking for workaround this worked for me
```jsonPath("$.whatever").value&lt;String?&gt; {
  assertNull(it)
}```

Are you returning `null` or are you just asserting that the field isn't there?

You could probably use :
```.json("""{"whatever":null}""")```