A Transform that feeds a copy of its input to several other transforms, then merges the results together using set union.
A Merge of T1, T2 and T3 applied to some input I results in T1(I) ∪ T2(I) ∪ T3(I).
An empty merge produces nothing (∅).
type: Merge sources: - <transform> - <transform> - <transform> - ... condition: <SpEL expression>
Mergeand other transformations in a shorthand syntax