claimFromClipboard method
Reads a funnel token out of the system clipboard and claims it.
iOS only. On Android this always resolves null without touching
the clipboard: Android's deferred-attribution path is the Play Install
Referrer, which claimInstall reads. Call both if you support both
platforms — this one is a no-op on Android by design, not a bug.
Implementation
Future<FunnelClaim?> claimFromClipboard() => _platform.claimFromClipboard();