Between two input datasets (a result of previous transformation and a final state of another table) chooses one that is not empty. If both tables are not empty then it gives preference based on transformation settings.
"If-then" types of workflows. In this scenario the workflow should be organized in a way that makes empty either one table (when a condition is fulfilled) or another (when the condition is NOT fulfilled). Then Either transformation is used to pick a non-empty result dataset of one of these tables. Since both tables can have different sets of transformations it allows applying different transformation logic depending on the condition.
Insertion of arbitrary datasets at any point of a transformation chain with the help of Sandbox transformation