Pack and unpack in ax 2009

Pack

this method is a standard method inherited from RunBase. It is used to save
the values that the user selects and store them until the next time the user executes
the class.
Public container pack () 
{
return [#CurrentVersion, #CurrentList];
}

===
unpack
Standard method inherited from RunBase and used to fetch the values that the user
selected the previous time he executed the class.
public boolean unpack(container packed Class)
{
Version version = RunBase::getVersion(packedClass);
;
switch (version)
{
case #CurrentVersion:
[version, #CurrentList] = packedClass;
break;
default:
return false;
}
return true;
}