`TAIFFCommentChunk`
pt		AssignTo
		Create
		Destroy
		LoadFromStream
		SaveToStream
		GetClassChunkName

`TAIFFDefinedChunk`
		Create

`TDefinedChunk`
pt		SetChunkName
pt		AssignTo
		Create
		LoadFromStream
		GetClassChunkName

`TCustomChunk`
pt		GetChunkName
pt		GetChunkSize
pt		CalculateZeroPad
pt		AssignTo
pt		SetChunkName
pt		CheckAddZeroPad
		Create
		LoadFromStream
		SaveToStream
		LoadFromFile
		SaveToFile

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