(PECL ev >= 0.2.0) Returns the previous set of values returned by EvStat::attr
(PECL ev >= 0.2.0) Configures the watcher
(PECL ev >= 0.2.0) Constructs EvStat watcher object
(PECL ev >= 0.2.0) Create a stopped EvStat watcher object
(PECL ev >= 0.2.0) Initiates the stat call
(PECL ev >= 0.2.0) Returns the values most recently detected by Ev