Identifies an NSData object containing the RGB color table.
Used only for GIF files. It’s stored as packed RGB. It’s set when reading in and used when writing out.
Available in Mac OS X v10.0 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)