Decodes encoded and writes the result to output.
public void Decode(ReadOnlyMemory<byte> encoded, IBufferWriter<byte> output, FilterContext context)
The data to decode: the stream's data, or the previous filter's output in a chain. Never empty.
Where to write the decoded bytes.
The filter's parameters (its DecodeParms dictionary), the stream's dictionary, the means to resolve references and
decode other streams, and the diagnostics sink.
ISO 32000-2 §7.4.3.