Debug/ set breakpoint at pipeline position

[blythed]

Would be nice to stop the runtime at a particular transform, using some kind of coordinate system.
E.g. set_breakpoint(my_transform, [1, 5, 2]). Next level would be to, in addition, add a breakpoint at a certain position
even within the code of a transform.

[jasonkhadka]

How about also having a breakpoint transform?

a = (
  t1
  >> t2
  >> padl.breakpoint
)