Note: The Java SE 5 and 6 compilers generatethis warning when the ArrayBuilder.addToList iscalled; in this example, the warning is generated for the classHeapPollutionExample. These compilers do not generatethe warning at the declaration site. However, the Java SE 7generates the warning at both the declaration site and the callsite (unless the warnings are preempted with annotations; seeSuppressing Warnings from Varargs Methodswith Non-Reifiable Formal Parameters for more information). Theadvantage of generating a warning when a compiler encounters avarargs method that has a non-reifiable varargs formal parameter atthe declaration site as opposed to the call site is that there isonly one declaration site; there are potentially many callsites.