Decision Service (DS) cases that should be handled:

• Add an external output Decision to a DS;
• Add an external encapsulated Decision to a DS;
• Add an external Decision to a DS which is used on an external DS. Add the external DS to the DRD (Conflict);
• Add an external DS, and add a external Decision to a DS which is used on the external DS to the DRD (Conflict);
• Add an external DS which uses a Decision from another external model. (3 DMNs required);

For all those cases, the Decision and DS should respect the current features.

• Move
• Resize
• Rename
• Delete
• Hide (shouldn't be possible to hide a Decision node that is from a DS)