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kotlinlang

is this the right way to declare the hidden method?
@kotlinx.cinterop.ObjCMethod(“”, “”)
 external fun NSURLRequest.Companion.setAllowsAnyHTTPSCertificate(allow: Boolean, host: NSString):kotlin.Unit

Please don’t use `@ObjCMethod` and/or `external`, it is not intended to be used in source code.
If I understand you correctly, adding `cinterop` configuration with `.def` file containing Objective-C category declaration should help.

How to make cinterop convert objc code? Is there a sample project?

Please refer to the documentation, for example: <https://kotlinlang.org/docs/tutorials/native/curl.html>
Use something like
```
language = Objective-C
---
@interface MyClass (MyCategory)
// ...
@end;
```
as `.def` file. In this case you don’t need `headers`/`linkerOpts`/whatever.