    | addBaseObject                           | None                |                                         
    | addTarget                               | None                |                                         
x   | create                                  | None                |                                         
    | envelope                                | None                | getEnvelope                             
    | getBaseObjects                          | None                |                                         
    | getTargets                              | None                |                                         
    | numWeights                              | None                | getNumWeights                           
    | origin                                  | None                | getOrigin                               
    | removeTarget                            | None                |                                         
    | setEnvelope                             | None                |                                         
    | setOrigin                               | None                |                                         
    | setWeight                               | None                |                                         
    | targetItemIndexList                     | None                | getTargetItemIndexList                  
    | type                                    | None                | getType                                 
    | weight                                  | None                | getWeight                               
    | weightIndexList                         | None                | getWeightIndexList                      
