callback with optional parameters do not generate nullable parameters

[itsramiel]

I have the following function:

pickFileCb(cb: (filepath: string | null) => void): void

but the generated swift methods is:

  func pickFileCb(cb: @escaping ((_ filepath: String) -> Void)) throws -> Void

I also tried filepth: string | undefined and filepath?: string and all doesnt work.

Note that it works with promises, so:

pickFileAsync(): Promise<string | null>

produces

  func pickFileAsync() throws -> Promise<String?>

[mrousavy]

Thanks for reporting, but this is a duplicate of #20

[mrousavy]

I found a fix for this: #143 :)