VariableGroup (or individual variable URL) from VariableOrderCopy the order of a VariableGroup (or individual variable URL) from VariableOrder
copyOrderGroup(group, source_map, target_map)returns either a VariableGroup (if a group is supplied) or a URL
(if just a variable URL is supplied)
the group or variable URL to be copied
url to alias map for source variables
alias to url map for target variables