after_77949994

solved the ManyToMany mapping of Cars to SamplePersons using an association table
Here is the Stack Overflow Question that this commit addresses.
https://stackoverflow.com/questions/77949994

after_77943523: applied stack overflow feedback #https://stackoverflow.com/questions/…

applied feedback from https://stackoverflow.com/questions/77943523
OneToMany and ManyToOne to compile
I don't have the grid bindings right and I'm sure other things are wrong too, but that stackoverflow answer helped a lot.