public void addDirectBaseClass(Composite comp, CppCompositeType baseClassType,
			ClassFieldAttributes attributes, int offset) throws PdbException {
		validateBaseClass(baseClassType);
		DirectLayoutBaseClass base =
			new DirectLayoutBaseClass(comp, baseClassType, attributes, offset);
		directLayoutBaseClasses.add(base);
	}
Method to add a direct base class for this class
@param comp the base composite
@param baseClassType the base class type
@param attributes the attributes of the base class
@param offset the offset
@throws PdbException upon issue with the base not being suitable
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/pdbapplicator/CppCompositeType.java