"Scriptable target" argument to Ref.(get|set|has|delete) methods. The idea was
to optimize away in many cases creation of Ref instances, but given that modern
JVM can GC short-lived objects efficiently it does not sound right to have code
complexity now in the hope of slightly more efficient implementation later.
git-svn-id: svn://10.0.0.236/trunk@168178 18797224-902f-48f8-a5cc-f745e15eee43