@Override
	public VTMatchSet getManualMatchSet() {
		if (manualMatchSet == null) {
			manualMatchSet = findMatchSet(ManualMatchProgramCorrelator.class.getName());
		}
		return manualMatchSet;
	}
Mark the state of a Version Tracking item as having changed and generate
the event of the specified type.  Any or all parameters may be null.
@param eventType event type
@param affected the version tracking object that was affected by the change.
@param oldValue original value or an Object that is related to the event.
@param newValue new value or an Object that is related to the event.
Ghidra/Features/VersionTracking/src/main/java/ghidra/feature/vt/api/db/VTSessionDB.java