tcher will fetch including the specific size.

 <p>
     A hash of the bytes of the data that will be fetched is the ideal id but since that is in many cases
     impractical, urls, file paths, and uris are normally sufficient.
 </p>

 <p>
     Note - this method will be run on the main thread so it should not perform blocking operations and should
     finish quickly.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/bumptech/glide/load/data/DataFetcher.html#getId()">getId</A