VisibilityQueryImplementation (General Queries API)

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org.netbeans.modules.queries/1 1.42.1

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VisibilityQueryImplementation2
```
public interface VisibilityQueryImplementation
```
Determine whether files should be hidden in views presented to the user.
Global lookup is used to find all instances of VisibilityQueryImplementation.

Threading note: implementors should avoid acquiring locks that might be held by other threads. Generally treat this interface similarly to SPIs in org.openide.filesystems with respect to threading semantics.

See Also:

VisibilityQuery

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addChangeListener(javax.swing.event.ChangeListener l)`	Add a listener to changes.
`boolean`	`isVisible(org.openide.filesystems.FileObject file)`	Check whether a file is recommended to be visible.
`void`	`removeChangeListener(javax.swing.event.ChangeListener l)`	Stop listening to changes.

- Method Detail
  - isVisible
```
boolean isVisible(org.openide.filesystems.FileObject file)
```
    Check whether a file is recommended to be visible.
    
    Parameters:
    
    file - a file to considered
    
    Returns:
    
    true if it is recommended to display this file
  - addChangeListener
```
void addChangeListener(javax.swing.event.ChangeListener l)
```
    Add a listener to changes.
    
    Parameters:
    
    l - a listener to add
  - removeChangeListener
```
void removeChangeListener(javax.swing.event.ChangeListener l)
```
    Stop listening to changes.
    
    Parameters:
    
    l - a listener to remove

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org.netbeans.modules.queries/1 1.42.1

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