@SuppressWarnings("unused")
	private static CommentHistoryAdapter findReadOnlyAdapter(DBHandle handle, AddressMap addrMap)
			throws VersionException, IOException {
		try {
			return new CommentHistoryAdapterV0(handle, addrMap.getOldAddressMap(), false);
		}
		catch (VersionException e) {
			// use the 'no table' below
		}

		return new CommentHistoryAdapterNoTable();
	}
Adapter for accessing records in the CommentHistory table.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/CommentHistoryAdapter.java