txt: ## alreadystarted.md
  class X::Proc::Async::AlreadyStarted
  
  Error due to calling start on an already started Proc::Async object
  
  ```raku
  class X::Proc::Async::AlreadyStarted is Exception {}
  ```
  
  When you call `start` twice on the same [`Proc::Async`](/type/Proc/Async) object, the second invocation will die with an `X::Proc::Async::AlreadyStarted` exception.
  
  ```raku
  my $proc = Proc::Async.new("echo");
  $proc.start;
  $proc.start;
  CATCH { default { put .^name, ': ', .Str } };
  # OUTPUT: «X::Proc::Async::AlreadyStarted: Process has already been started␤»
  ```
  