Nullifying Active object variables

Hello Team,

In a script i declared like (scripts runs at Applet level)

try

{

var ActiveBO = TheApplication().ActiveBusObject();

var SRBC = ActiveBO.GetBusComp("Service Request");

var thisobject = this;

CodeExecution()

}

catch(e)

{     throw(e);}

finally

{

}

in finally i will have to nullify the objects as per best practicies normally when we declare object like GetBusObject() instead of ActiveBusObject(), we can nullify this variable. but when we use ActiveBusObject (ActiveBO ) do i need to nullify? or let it keep , if i keep (not nullifying) will the memory released after function ends?

or as per best practices i should not nullify any activeBO objects?