8059844: Implement optimistic splitter
Reviewed-by: hannesw, lagergren

8059843: Make AST serializable
Reviewed-by: hannesw, lagergren

8057588: Lots of trivial (empty) classes were generated by the Nashorn compiler as part of restOf-method generation
Reviewed-by: attila, sundar, hannesw

8054834: Modular Source Code
Reviewed-by: alanb, chegar, ihse, mduigou
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, chris.hegarty@oracle.com, erik.joelsson@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, magnus.ihse.bursie@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, paul.sandoz@oracle.com