* equal to the source version of the compile.
*/
private void checkSourceVersionCompatibility(Source source, Log log) {
SourceVersion procSourceVersion = processor.getSupportedSourceVersion();
if (procSourceVersion.compareTo(Source.toSourceVersion(source)) < 0 ) {
log.warning("proc.processor.incompatible.source.version",
procSourceVersion,
processor.getClass().getName(),
source.name);
}