An operation which exposes an indefinite amount of responses, just like the Manual operation already available in the Base content pack from Micro Focus, but this operation would not take manual user input instead it would have an input which is filled from a flow variable or such.
By having this operation you could define multiple flowpaths within the flow. During runtime it would be determined which path will be taking. This could also be achieved by chaining String Equals comparators after each other, but this solution would make the flow unnecessarily complex and as such decrease maintainability and performance.
For more information on switchcase operation please read the wiki page: