Easy Query for Tuple Set of Objects with Origin Function

[chrisdxie]

In the Aircraft Detection problem, assume there are some number of distinct aircrafts. There should be a fast way of querying some property of the Blips that come from Aircraft a.

The tuple set query:

  {b for Blip b : Source(b) = a}

should be easily written as something like Blip(Source=a) or {Blip(Source=a)}

[lileicc]

Could be even simpler, Blip(a).