isCampaignAvailable static method
Returns true if a campaign is available matching the provided label or default @param provided label or null if default campaign
Implementation
static Future<bool> isCampaignAvailable({String? label, String? url}) async {
var variableMap = {"label": label, "url": url};
bool available =
await channel.invokeMethod("isCampaignAvailable", variableMap);
return available;
}