private void initTreeMap(OpenMode openMode, TaskMonitor monitor)
			throws IOException, CancelledException, VersionException {
		treeMap = new HashMap<>();
		RecordIterator iter = treeAdapter.getRecords();
		while (iter.hasNext()) {
			DBRecord rec = iter.next();
			String treeName = rec.getString(ProgramTreeDBAdapter.TREE_NAME_COL);
			ModuleManager mm = new ModuleManager(this, rec, openMode, monitor);
			treeMap.put(treeName, mm);
		}
	}
Populate the map with existing tree views.
@throws VersionException if a DB schema version differs from expected version
@throws CancelledException if operation cancelled
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/module/TreeManager.java