{OperatorType} operator The comparison operator. Possible values
include: 'EqualTo', 'GreaterThan', 'GreaterThanOrEqualTo'
threshold
threshold:number
member
{number} threshold Threshold value associated with a notification.
Notification is sent when the cost exceeded the threshold. It is always
percent and has to be between 0 and 1000.
An interface representing Notification. The notification associated with a budget.