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<ac:structured-macro ac:name="anchor" ac:schema-version="1" ac:macro-id="de314d1fcc1f4742-5515ad78-457349ee-985bb0c5-23a3332e050d337a9e1fce12"><ac:parameter ac:name="">CON20-EX1</ac:parameter></ac:structured-macro>
*TSM02-EX1:* It is permissible to start a background thread during class initialization provided the thread does not access any fields. For example, the {{ObjectPreserver}} class (based on \[[Grand 2002|AA. Bibliography#Grand 02]\]) shown below provides a mechanism for storing object references, which prevents an object from being garbage-collected, even if the object is not de-referenced in the future.