sizeHint method
If possible give a hint of expected size of the encoding.
This method is used inside default implementation of encode
to avoid re-allocations.
Implementation
@override
int sizeHint(Variant variant) {
int size = StrCodec.codec.sizeHint(variant.name);
size += SequenceCodec(Field.codec).sizeHint(variant.fields);
size += U8Codec.codec.sizeHint(variant.index);
size += SequenceCodec(StrCodec.codec).sizeHint(variant.docs);
return size;
}