Returns a comma-separated list of attributes
that can be set for an object or widget.
     
    Syntax
      
      
          
          
            
              
                LIST-SET-ATTRS ( handle ) 
               | 
            
          
        
 
      
        
          - 
            handle
          
 
          - A handle to a valid object or widget. The function returns a
list of the attributes that can be set for that object or widget.
 
        
      
     
    
    Note
      
      When used
with the SECURITY-POLICY handle, this function does not return the
XCODE-SESSION-KEY writeable attribute because this attribute contains
an encryption key for encrypted source code.