Error3_call.swift

let previousErrorHandler:ErrorHandleable = /// existing handler
// setup a handler
let errorHandler = previousErrorHandler.catch {error in
  // Log all errors into console and pass it further
  print(error)
  throw error
}.catch {
  // Stop propagation for all errors(no throwing)
}
...
errorHandler.throw(AppError.tokenExpired){
  // finally block
}