GFileIface.copyAsync

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
struct GFileIface
extern (C)
void function(GFile* source, GFile* destination, GFileCopyFlags flags, int ioPriority, GCancellable* cancellable, GFileProgressCallback progressCallback, void* progressCallbackData, GAsyncReadyCallback callback, void* userData) copyAsync;

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