public DIEAggregate getAggregate(DebugInfoEntry die) {
		DIEAggregate diea = (die != null) ? aggsByOffset.get(die.getOffset()) : null;
		if (diea == null && die != null) {
			diea = DIEAggregate.createFromHead(die);
			aggsByOffset.put(die.getOffset(), diea);
		}
		return diea;
	}
Returns the {@link DIEAggregate} that contains the specified {@link DebugInfoEntry}.

@param die {@link DebugInfoEntry} or null
@return {@link DIEAggregate} that contains the specified DIE, or null if DIE null or
the aggregate was not found.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/DWARFProgram.java