pack method
Serialize the object using the given builder, returning the offset.
Implementation
@override
int pack(fb.Builder fbBuilder) {
final int? verticesOffset = vertices == null ? null
: fbBuilder.writeListUint8(vertices!);
fbBuilder.startTable(2);
fbBuilder.addOffset(0, verticesOffset);
fbBuilder.addUint32(1, vertexCount);
return fbBuilder.endTable();
}