FreespaceFiller SourceCode GPL - https://github.com/iboxdb/db4o-gpl

```
public interface FreespaceFiller
```
Callback hook for overwriting freed space in the database file.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void fill(BlockAwareBinWindow io)
  Called to overwrite freed space in the database file.

- Method Detail
  - fill
```
void fill(BlockAwareBinWindow io)
   throws java.io.IOException
```
    Called to overwrite freed space in the database file.
    
    Parameters:
    
    io - Handle for the freed slot
    
    Throws:
    
    java.io.IOException