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<td><font face="Times">One typical use for <b>IOFindNameForValue()</b> is to map integer return values into error strings. IODevice's <b>IOStringFromReturn:</b> method performs this function. A subclass that defines additional IOReturn values should override this method and call <b>[super IOReturnToString:]</b> if the specified value does not match one of the class-specific IOReturns.</font></td></tr>

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