protected DebugInfoEntry addFwdPtr(int fwdRecordOffset) {
		ensureCompUnit();
		long absOffset =
			dwarfProg.getRelativeDIEOffset(fwdRecordOffset + /* the ptr die we are about to add */ 1);
		return new DIECreator(dwarfProg, DW_TAG_pointer_type)
				.addRef(DW_AT_type, absOffset)
				.create();
	}
Base class for unit tests needing DWARF DIEs.  Provides 2 DWARF compile-units and helper
methods to create DIE records.
Ghidra/Features/Base/src/test/java/ghidra/app/util/bin/format/dwarf/DWARFTestBase.java