Array<String> findSubscribers(String type, String subject)
String type parameter is the type of the subscription and can be
String subject parameter is the subject of the subscription and depends on the
type parameter as follows:
INPUT: subjects can be
SERVICE: subjects can be
WIDGET: pass the empty string as the subject, the
widgetIdof the current app is populated in this field by the Engine
Returns an array of
String(s) which is a list of
instanceIds identifying the remote devices that match the given
null when no remote devices match.
Uber method to find all subscribers for a given
subject. Get all instance IDs of connected devices that are subscribed for the type and subject. If a device is currently in a disconnected
state, it is not included in the array.