`TDecompressionStream`
pt		IdRead
pt		IdWrite
pt		IdSeek
		Create
		Destroy
		InitRead
		IsGZip

`TCustomZlibStream`
pt		Progress
pt		IdSetSize
		Create
		Destroy

`TIdBaseStream`
pt		IdRead
pt		IdWrite
pt		IdSeek
pt		IdSetSize
pt		SetSize
		Read
		Write
		Seek

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