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Hi, I am using kotlinx.serialization ContentNegotiation and my response have the following hierarchy:
```sealed class A () 
data class B(val name) : A()
data class C(val name): A()```
My endpoint returns a List&lt;A&gt; and according to <https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/polymorphism.md#sealed-classes> I would expect the following format:
```[
  {
	"type": "com.A",
	"name": "name"
  }
]```
And I am getting this format when Log the response object. Unfortunately, I got another response format when calling the endpoint:
```[
  [
	"com.A",
	{
	  "name": "name"
	}
  ]
]```
Any ideas why this different format appears when responding with call.respond(object)?

I fixed same behavior by configuring arrayPolymorphism parameter for json configuration in install method. Unfortunately I don't have a laptop so I can't easily find a proper code snippet for this case

I added the configuration, but it didn't solve my problem

Now I fixed it. the value must be changed to false, wich is also the default of kotlinx.serialization in normal usage. Thank you for the hint.