tuned def. of del and proved preservation of rbt (finally)
theory MicroJava
imports
"J/JTypeSafe"
"J/Example"
"J/JListExample"
"JVM/JVMListExample"
"JVM/JVMDefensive"
"BV/LBVJVM"
"BV/BVNoTypeError"
"BV/BVExample"
"Comp/CorrComp"
"Comp/CorrCompTp"
begin
end