Fold
Generated from the engine's own definition: compute-engine's symbol, which we neither extend nor document by hand. No examples yet — the crosswalk is the reason it has a page.
Fold a collection to a single value, applying a binary function f(accumulator, element) left to right from an initial value.
Fold(reducer: (unknown, T) any -> unknown, initial: value, collection<T>) -> value where Tas compute-engine declares it