signature_func typedef Null safety

signature_func = Void Function(Pointer<Uint8> sig, Uint32 mlen, Pointer<Uint8> m, Pointer<Uint8> randr, Pointer<Uint8> sk)

Implementation

typedef signature_func = Void Function(Pointer<Uint8> sig, Uint32 mlen,
    Pointer<Uint8> m, Pointer<Uint8> randr, Pointer<Uint8> sk);