Translations:Module:Arguments/doc/102/en
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If $1 is set, then it is possible to add new values to the table, but it is not possible to add a value if it would overwrite any arguments that are passed from $2.
If $1 is set, then it is possible to add new values to the table, but it is not possible to add a value if it would overwrite any arguments that are passed from $2.