Internal tag of parent not applied for nested struct (Flutter)

[Hsilgos]

For Flutter, the nested struct of an internal struct is exposed.

package sdk.core

@Internal
struct OuterStruct {
    struct InnerStruct {
        a: Int = 1
    }

    inner: InnerStruct = {}
}

Leads to

export 'src/sdk/core/outer_struct.dart' show OuterStruct_InnerStruct;

Expected: inter struct not exposed

Current workaround:
Add @internal tag to nested struct.

[hliberacki]

Hi @Hsilgos,

As we discussed in #1601, I will try implementing it.