public synchronized void clearMatchInfoInternalCache() {
		for (MatchInfo info : weakMap.values()) {
			if (info != null) {
				info.clearCache();
			}
		}
	}
Hash map with weak values. When MatchInfo is no longer held by an object,
the entry is removed from the map.
Ghidra/Features/VersionTracking/src/main/java/ghidra/feature/vt/gui/util/MatchInfoFactory.java