CompositeNDP                                                      
│    provides   money   SB(≥0) USD │ requires   energy   SB(≥0) W 
│  2 nodes, 0 edges                                               
│   connected rec: ✓                                              
│  no connections                                                 
│  Unconnected func:                                              
│   {CFunction(dp='_res_energy', s='energy')}                     
│  Unconnected res:                                               
│   {CResource(dp='_fun_money', s='money')}