childBuilder property
Optional builder for the button visual. When null, falls back to the
React Native parity Material OutlinedButton with a themed
CircularProgressIndicator while the export is in flight. When
non-null, the builder is invoked whenever the wallet is eligible to
export and receives the current isLoading flag plus an onExport
callback that the consumer wires to their own tap target. The
onExport callback is null while loading so consumers can disable
their button directly without a separate mounted check.
Implementation
final CrossmintExportPrivateKeyButtonBuilder? childBuilder;