@Override
	int getLength() {
		if (list.isEmpty()) {
			return 0;
		}
		return list.get(0).getLength(); // length is base-datatype-length
	}
<code>BitFieldGroupCompositeMember</code> provides the ability to collect related
{@link DefaultCompositeMember} members within a group during the composite reconstruction
process.
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb/BitFieldGroupCompositeMember.java