FileSystemWatcher  
    A file system watcher notifies about changes to files and folders on disk or from other FileSystemProviders.
To get an instance of a FileSystemWatcher use createFileSystemWatcher.
Properties
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                  true if this file system watcher has been created such that it ignores change file system events.
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                  true if this file system watcher has been created such that it ignores creation file system events.
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                  true if this file system watcher has been created such that it ignores delete file system events.
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                  An event which fires on file/folder change.
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                  An event which fires on file/folder creation.
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                  An event which fires on file/folder deletion.