get abstract method

Retrieves the asset represented by this resource.

• If the asset does not exist and throwIfNotFound is provided, the supplied exception will be thrown.
• If throwIfNotFound is not provided, a generic exception may be thrown.

Example

try {
  final asset = resource.get(() => Exception("Missing resource"));
  print("Loaded: $asset");
} catch (e) {
  print("Failed to load asset: $e");
}