$toBeRestored1=newValue1
$toBeRestored2=newValue2
$canBeOverwritten=newValue3
Values inside nested source: "$toBeRestored1", "$toBeRestored2", "$canBeOverwritten".
$toBeRestored1=newValue1
$toBeRestored2=newValue2
$canBeOverwritten=newValue3
Values inside nested source: "$toBeRestored1", "$toBeRestored2", "$canBeOverwritten".