This class is reserved and cannot be directly instantiated.
DidStart() Event raised when DataSet started retrieving data.
NewValue(value: Object) Event raised when a new value becomes available.
DidFinish() Event raised when DataSet finished retrieving data.
DidFail() Event raised in case of DataSet error.
var treeData: Bool Used to check if DataSet is representing complex hierarchical data. (read-only)
var value: Object Used to retrieve current DataSet value. (read-only)
var running: Bool Used to check if DataSet is running. (read-only)
var cancelled: Bool Used to check if DataSet has been cancelled. (read-only)
var error: String Last Error message. (read-only)
func run() Start current DataSet.
func stop() Stop current DataSet.