emit-dts fails with private function in class that is typed with non explicitly typed const

[menny]

Describe the bug

emit dts fails on non-exported expressions which are part of an exported class.
This fails with swc: playground
but passes with tsc: playground

Input code

const A_SYMBOL = Symbol("A_SYMBOL");
const func = () => null;

export class SomeClass {
    private func(
            queryFingerprint: string,
            onStale: () => void
        ): null | typeof A_SYMBOL {
            return null;
    };
    
    private func2(
            queryFingerprint: string,
            onStale: () => void
        ): null | typeof func {
            return null;
    };
}

Config

{
  "jsc": {
    "parser": {
      "syntax": "typescript",
      "tsx": true
    },
    "experimental": {
        "emitIsolatedDts": true
    }
  },
  "sourceMaps": true
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.10.16&code=H4sIAAAAAAAAA7WQMQ%2BCMBCF9%2F6KixMkTo4QTNTESePQyclgPQhJabFciQT579YKGuLg5C3v8vru%2BrVCq5pgdeLH%2FfqwgwR4W561DGajNQtjJnwos0q4QBBCsgRlpYwZw1ulDYGQaV0D1yVufNcxcFWZokkJ%2FWDgnbGuFk27LVSOxoUURVCT03w%2BSWnFKZUYDVc2uri8z8PII8AdqK1QZ58ndJMdBskaNeA%2Bjf4lX4CLvxP6%2F%2FtN17MHmuP435QBAAA%3D&config=H4sIAAAAAAAAA1WMOQ6AMAwEe14RueYF1DQUPCIKLoI4LNtIQYi%2FY64Iut0Z7W6Fc9BLgMptFq2QZ0HO3Yisk%2FpkBHQllMCRFMrXqpxKecGL7LcATIQcR7Tp8Dk7zRi1kXnwil2t8hsXzwHIvHDA1lP2%2BwE5e0RDqwAAAA%3D%3D

SWC Info output

x TS9010: Variable must have an explicit type annotation with --isolatedDeclarations.
,-[input.tsx:1:1]
1 | const A_SYMBOL = Symbol("A_SYMBOL");
: ^^^^^^^^
2 | const func = () => null;
3 |
4 | export class SomeClass {
---- x TS9007: Function must have an explicit return type annotation with --isolatedDeclarations. ,-[input.tsx:2:1] 1 | const A_SYMBOL = Symbol("A_SYMBOL"); 2 | const func = () => null; : ^^^^^^^ 3 | 4 | export class SomeClass { 5 | private func( ----

Expected behavior

shoud emit this dts:

export declare class SomeClass {
    private func;
    private func2;
}

Actual behavior

Fails to output dts

Version

1.10.16

Additional context

No response