/list/proc/Copy(Start, End)
Arguments:
Start = 1: Index of the first element to be included in the copy
End = 0: Index past the last element to be included in the copy, or 0 for the last element
Returns:
A shallow copy of the list

Returns a new shallow copy of the list.

var/list/L1 = list(1, 2, 3)
var/list/L2 = L1.Copy(2)

world.log << json_encode(L2) // "[2,3]"