toValueString method
Implementation
String toValueString() => '''
abstract class $className {
${assets.map((AssetItem item) => ' ${item.toValueString()}'.replaceAll('\n', '\n ')).join('\n\n')}
}
''';
String toValueString() => '''
abstract class $className {
${assets.map((AssetItem item) => ' ${item.toValueString()}'.replaceAll('\n', '\n ')).join('\n\n')}
}
''';