@Override
    public ProtoId get(int index) {
      checkBounds(index, tableOfContents.protoIds.size);
      return open(tableOfContents.protoIds.off + (SizeOf.PROTO_ID_ITEM * index)).readProtoId();
    }
Returns the number of bytes used by this section.
android/android_framework/dex-maker/src/main/java/com/android/dex/Dex.java