private static CommentsDBAdapter findReadOnlyAdapter(DBHandle handle, AddressMap addrMap)
			throws VersionException, IOException {
		try {
			return new CommentsDBAdapterV1(handle, addrMap.getOldAddressMap(), false);
		}
		catch (VersionException e) {
			// ignore
		}

		return new CommentsDBAdapterV0(handle, addrMap);
	}
Adapter to access the comments table for code units. The primary key
for the table is the address. The record contains all of the comment
types: Pre, Post, EOL, Plate, and Repeatable.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/CommentsDBAdapter.java