@Override
	public ProgramArchitecture getProgramArchitecture() {
		return programArchitecture;
	}
Read the DB-serialized data organization.  If one has not been stored a suitable
default will be returned.
@return stored data organization or suitable default.
@throws IOException if DB error orccurs
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/data/DataTypeManagerDB.java