function -returns: Nothing
'try (block that can fail: 
 closure () -returns: iso Result with [Success = Nothing, Error = dyn Exception])
catch (error handling block: closure (error: dyn iso Exception) -returns: Nothing)
else (do things: closure () -returns: Nothing = {})'
{
 match (block that can fail ()) {
  when ($ .== (.failure)) do {
   error hadnling block (error=error)
  }
  when ($ .== (.success)) do {
   do things ()
  }
 } else {
  do things ()
 }
}

try {
 var smart femenist = 
  try (Femenist . make random instance)
  else { throw ("Obvious failure") }
} catch {
 match error {
  when ($ .== ("Obvious failure")) do {
   put on screen ("Did you expect different outcome?")
  }
 } else {}
} else {
 //do nothing otherwise
}