public DIEAggregate getAggregate(long dieOffset) {
		DIEAggregate diea = aggsByOffset.get(dieOffset);
		if (diea != null) {
			return diea;
		}
		DebugInfoEntry die = getDIEByOffset(dieOffset);
		return getAggregate(die);
	}
Returns the {@link DIEAggregate} that contains the {@link DebugInfoEntry} specified
by the offset.

@param dieOffset offset of a DIE record
@return {@link DIEAggregate} that contains the DIE record specified, or null if bad
offset.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/DWARFProgram.java