[+] SwitchStatementEater and SwitchLabelStatementEater are implemented
[+] EmptyStatementEater is implemented
[+] LabelStatementEater is implemented
     - Snapshot is extended for label strorage
[*] SwitchLabelStatementEater file renamed
[+] LockStatementEater is implemented
[+] ThrowStatementEater is implemented
[+] ReturnStatementEater is implemented
[+] YieldStatementEater is implemented
[+] GotoStatementEater is implemented
[+] GotoCaseStatementEater is implemented