public Composite getSelfBaseType() {
		return selfBaseType;
	}
Returns the "self-base" composite for this class.  When a separate self base is not
needed for this class, the composite is the same as the layout composite returned by
{@link #getComposite()}
@return the self-base composite
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/pdbapplicator/CppCompositeType.java