FileSystemEventListener

```
public interface FileSystemEventListener
```
Events broadcast when a GFileSystem is closed or has a FileSystemRef change.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onFilesystemClose(GFileSystem fs)`	Called by GFilesystem's `Closeable.close()`, before any destructive changes are made to the filesystem instance.
`void`	`onFilesystemRefChange(GFileSystem fs, FileSystemRefManager refManager)`	Called by `FileSystemRefManager` when a new `FileSystemRef` is created or released.

- Method Detail
  - onFilesystemClose
```
void onFilesystemClose(GFileSystem fs)
```
    Called by GFilesystem's Closeable.close(), before any destructive changes are made to the filesystem instance.
    
    Parameters:
    
    fs - GFileSystem that is about to be closed.
  - onFilesystemRefChange
```
void onFilesystemRefChange(GFileSystem fs,
                           FileSystemRefManager refManager)
```
    Called by FileSystemRefManager when a new FileSystemRef is created or released.
    
    Parameters:
    
    fs - GFileSystem that is being updated.
    
    refManager - FileSystemRefManager that is tracking the modified GFileSystem.