Variables for {{{1}}} can be made using a Field As Variable which can wrap any type (Generic). Variables can also be made by dragging a source of the same wrapped type (ex:Variable<String> -> Source<String>) into any variable input and it will make a special converter to connect them. This can be multiplexed using Multiplexing for using multiple variables into the same input on {{{1}}}. Multiplexing the inputs on {{{1}}} can be useful in modifying a list of variables during a For or While loop.