whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String id,
    2. String version,
    3. String entry,
    4. String contractVersion,
    5. @SdkVersionRangeConverter() SdkVersionRange sdkVersionRange,
    6. List<Capability> requiredCapabilities,
    7. List<FeatureFlagKey> featureFlags,
    8. MiniProgramCachePolicy cachePolicy,
    9. MiniProgramFallback? fallback,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( String id,  String version,  String entry,  String contractVersion, @SdkVersionRangeConverter()  SdkVersionRange sdkVersionRange,  List<Capability> requiredCapabilities,  List<FeatureFlagKey> featureFlags,  MiniProgramCachePolicy cachePolicy,  MiniProgramFallback? fallback)?  $default,) {final _that = this;
switch (_that) {
case _MiniProgramManifest() when $default != null:
return $default(_that.id,_that.version,_that.entry,_that.contractVersion,_that.sdkVersionRange,_that.requiredCapabilities,_that.featureFlags,_that.cachePolicy,_that.fallback);case _:
  return null;

}
}