events called perpetually

using the notify backend i've noticed an event handler keeps getting called. Should I do something in the handler?

calling stopPropagation on the event prevents the handler being called multiple times, but the logger still shows the create/deletion multiple times.

```
<?php

/**
 * change this to point to the lumasol data directory
 */
$lumasolRootDataPath = __DIR__ . '/../data';

error_reporting(E_ALL);
ini_set('display_errors', 'on');

require_once __DIR__ . '/../vendor/autoload.php';

$lumasolRootDataPath = realpath($lumasolRootDataPath);

if ($lumasolRootDataPath === false) {
    die("lumasol data path incorrect");
}

use Monolog\Logger;
use Monolog\Handler\StreamHandler;


$watcher = \Kwf\FileWatcher\Watcher::create($lumasolRootDataPath);

// logging to console
$logger = new Logger('filewatcher');
$logger->pushHandler(new StreamHandler(fopen('php://stdout', 'w'), Logger::DEBUG));
$watcher->setLogger($logger);

$watcher->addListener(\Kwf\FileWatcher\Event\Create::NAME, function (\Symfony\Component\EventDispatcher\Event $e) {
    var_dump($e);
    $e->stopPropagation();
});
$watcher->addListener(\Kwf\FileWatcher\Event\Delete::NAME, function (\Symfony\Component\EventDispatcher\Event $e) {
    var_dump($e);
    $e->stopPropagation();
});

$watcher->start();

```

output while creating a file and then deleting it...

```
[lumasol@srv1 public_html]$ ./bin/emailer.sh 
[2017-08-03 15:48:58] filewatcher.INFO: Watches set up... [] []
[2017-08-03 15:49:04] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
object(Kwf\FileWatcher\Event\Create)#7 (4) {
  ["filename"]=>
  string(40) "/home/lumasol/lumasol-data/untitled file"
  ["propagationStopped":"Symfony\Component\EventDispatcher\Event":private]=>
  bool(false)
  ["dispatcher":"Symfony\Component\EventDispatcher\Event":private]=>
  object(Symfony\Component\EventDispatcher\EventDispatcher)#13 (2) {
    ["listeners":"Symfony\Component\EventDispatcher\EventDispatcher":private]=>
    array(2) {
      ["filewatcher.create"]=>
      array(1) {
        [0]=>
        array(1) {
          [0]=>
          object(Closure)#12 (1) {
            ["parameter"]=>
            array(1) {
              ["$e"]=>
              string(10) "<required>"
            }
          }
        }
      }
      ["filewatcher.delete"]=>
      array(1) {
        [0]=>
        array(1) {
          [0]=>
          object(Closure)#16 (1) {
            ["parameter"]=>
            array(1) {
              ["$e"]=>
              string(10) "<required>"
            }
          }
        }
      }
    }
    ["sorted":"Symfony\Component\EventDispatcher\EventDispatcher":private]=>
    array(1) {
      ["filewatcher.create"]=>
      array(1) {
        [0]=>
        object(Closure)#12 (1) {
          ["parameter"]=>
          array(1) {
            ["$e"]=>
            string(10) "<required>"
          }
        }
      }
    }
  }
  ["name":"Symfony\Component\EventDispatcher\Event":private]=>
  string(18) "filewatcher.create"
}
[2017-08-03 15:49:04] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:04] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:04] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:04] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:04] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:04] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:04] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:05] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:06] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
object(Kwf\FileWatcher\Event\Delete)#5 (4) {
  ["filename"]=>
  string(40) "/home/lumasol/lumasol-data/untitled file"
  ["propagationStopped":"Symfony\Component\EventDispatcher\Event":private]=>
  bool(false)
  ["dispatcher":"Symfony\Component\EventDispatcher\Event":private]=>
  object(Symfony\Component\EventDispatcher\EventDispatcher)#13 (2) {
    ["listeners":"Symfony\Component\EventDispatcher\EventDispatcher":private]=>
    array(2) {
      ["filewatcher.create"]=>
      array(1) {
        [0]=>
        array(1) {
          [0]=>
          object(Closure)#12 (1) {
            ["parameter"]=>
            array(1) {
              ["$e"]=>
              string(10) "<required>"
            }
          }
        }
      }
      ["filewatcher.delete"]=>
      array(1) {
        [0]=>
        array(1) {
          [0]=>
          object(Closure)#16 (1) {
            ["parameter"]=>
            array(1) {
              ["$e"]=>
              string(10) "<required>"
            }
          }
        }
      }
    }
    ["sorted":"Symfony\Component\EventDispatcher\EventDispatcher":private]=>
    array(2) {
      ["filewatcher.create"]=>
      array(1) {
        [0]=>
        object(Closure)#12 (1) {
          ["parameter"]=>
          array(1) {
            ["$e"]=>
            string(10) "<required>"
          }
        }
      }
      ["filewatcher.delete"]=>
      array(1) {
        [0]=>
        object(Closure)#16 (1) {
          ["parameter"]=>
          array(1) {
            ["$e"]=>
            string(10) "<required>"
          }
        }
      }
    }
  }
  ["name":"Symfony\Component\EventDispatcher\Event":private]=>
  string(18) "filewatcher.delete"
}
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:07] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:08] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.create: /home/lumasol/lumasol-data/untitled file [] []
[2017-08-03 15:49:09] filewatcher.INFO: filewatcher.delete: /home/lumasol/lumasol-data/untitled file [] []
```

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events called perpetually #2

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