RestorableChunkHeadersCallback typedef
RestorableChunkHeadersCallback =
Map<String, String> Function(FileUploadPresentationResponse presentation, FileChunk chunk)
compose request upload chunks headers from
FileUploadPresentationResponse and FileChunk
Implementation
typedef RestorableChunkHeadersCallback = Map<String, String> Function(
FileUploadPresentationResponse presentation,
FileChunk chunk,
);