cs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>getId</B>()</PRE>
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<DD>Returns an ID identifying any transformation this decoder may apply to the given data that will be mixed in to
 the cache key.

 <p>
     If the decoder does not transform the data in a way that significantly affects the cached
     result (ie performs no downsampling) an empty string is an appropriate id.
 </p>
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