DefineFunction
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.
Define one clause of a (possibly multi-clause) function: `DefineFunction(f, Function(body, params…))`. Unlike `Assign` — which replaces the binding wholesale — `DefineFunction` ACCUMULATES: a clause with the same parameter domain replaces the earlier clause in place, any other clause is appended, and calls dispatch to the most specific clause admitting the arguments.
DefineFunction(symbol, function, dictionary<any>?) scope -> nothingas compute-engine declares it