code: public void setThingGroupsToAdd(java.util.Collection<String> thingGroupsToAdd) {
          if (thingGroupsToAdd == null) {
              this.thingGroupsToAdd = null;
              return;
          }
  
          this.thingGroupsToAdd = new java.util.ArrayList<String>(thingGroupsToAdd);
      }
docs: <p>
  The groups to which the thing will be added.
  </p>
  
  @param thingGroupsToAdd
  The groups to which the thing will be added.