How to check connection on Capsule\Manager static global?

[Abdillah]

When initializing database and calling setAsGlobal() we can get database functionality through static call. But, how to check if a default connection is set or database is good to receive query? Since doing a check on the result Capsule\Manager::connection() may cause fatal error, and we have no way to retrieve default global instance (singleton).

// ERROR here, get fatal error
if (!Capsule\Manager::connection()) {
    // Establish connection!
}