For this presentation we will review a complex DataWeave transformation use-case (based on a real use-case). Alexandra will explain the given input data and the expected output data. We will work together to find the appropriate solution with the use of Functions, Variables, and several other core functions/operators like isEmpty, reduce, map, groupby, flatten, remove, sum, concatenation, prepend, if/else, do, default, ranges, and the object destructor.