itemBuilder property
Optional per-item builder. When null, items render with the Material
CrossmintNftCard (React Native SDK parity default). When non-null,
the builder is invoked for every NFT in nfts; the supplied onTap
callback is wired to onNftTap so consumers do not have to re-derive
the tap wiring in their custom card.
Implementation
final CrossmintNftItemBuilder? itemBuilder;