writeCanRead function
A build behavior which writes either 'true' or 'false' depending on whether
assetId
can be read.
Implementation
BuildBehavior writeCanRead(AssetId assetId) =>
(
BuildStep buildStep,
Map<String, List<String>> buildExtensions,
) => _copyToAll(
buildStep,
buildExtensions,
readFrom: (_) => assetId,
read: (buildStep, assetId) async => '${await buildStep.canRead(assetId)}',
);