Dummy session storage class.
Implements session storage place holder. No actual storage will be done.
Methods
    
  
  
  
    
    
    
    
    
    
      Class Public methods
      
        
            
              new(session, option=nil)
            
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            Create a new NullStore instance.
session is the session this instance is associated with.
option is a list of initialisation options.  None are
currently recognised.
Instance Public methods
      
        
            
              close()
            
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            Close session storage.
A no-op.
            
              delete()
            
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            Delete the session state.
A no-op.
            
              restore()
            
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            Restore (empty) session state.