fetchOrDefault

Executes the given block and returns its result, or default if an exception is thrown.

Unlike fetchOrNull { ... } ?: default, this preserves the distinction between a block that returns null vs a block that throws - only exceptions trigger the default.

CancellationException is always rethrown to preserve structured concurrency.

Example:

val hasProfilePicture: Boolean = fetchOrDefault(false) {
    (user.getCanViewProfilePicture() ?: false) &&
        (user.getUserRepresentationUrl()?.getHasProfilePicture() ?: false)
}