(Yaf >=1.0.0) The key purpose public void

(Yaf >=1.0.0) The __sleep purpose private

(Yaf >=1.0.0) The del purpose public void

(Yaf >=1.0.0) The next purpose public void

(Yaf >=1.0.0) The __set purpose public void

(Yaf >=1.0.0) The getInstance purpose public

(Yaf >=1.0.0) The __unset purpose public void

(Yaf >=1.0.0) The __clone purpose private

(Yaf >=1.0.0) The __get purpose public void

(Yaf >=1.0.0) Constructor of Yaf_Session private