##HealthySourceFoundEvent
This event will be fired when a healthy backup is found.
It has one public property: $source
##UnhealthySourceFoundEvent
This event will be fired when a unhealthy backup is found.
It has two public properties: $source and $failureMessages, which is an array.
##HealthyDestinationFoundEvent
It has one public property: $destination
This event will be fired when a healthy destination is found.
##UnhealthyDestinationFoundEvent
This event will be fired when a unhealthy destination is found.
It has two public properties: $destination and $failureMessages, which is an array.