EaseLookup enables you to find the easing function associated with a particular name (String), like "strongEaseOut" which can be useful when loading in XML data that comes in as Strings but needs to be translated to native function references.
GreenSock Docs
EaseLookup
Methods
find( name:String ) : Ease
[static] Finds the easing function associated with a particular name (String), like "easeOutStrong".