private MarkupItemStorageDB getMarkupItemForRecord(DBRecord markupItemRecord) {
		try {
			lock.acquire();
			MarkupItemStorageDB markupItem = markupItemCache.get(markupItemRecord);
			if (markupItem == null) {
				markupItem = new MarkupItemStorageDB(markupItemRecord, markupItemCache, this);
			}
			return markupItem;
		}
		finally {
			lock.release();
		}
	}
Called when an existing session has been initialized with its programs.  This is not called
when a new session is created.
Ghidra/Features/VersionTracking/src/main/java/ghidra/feature/vt/api/db/AssociationDatabaseManager.java