Laravel. How to join values ​​from 2 columns, 2 different tables)?

Question

ORM

The programs table has a json_stream column. With the value m - I ["1stream","2stream"].
attach the channels table to the programs table, in which there is a stream column, with the value m - ["3stream","4stream"].
I make a selection like this
$program = Program::with('channel')->first();
Is it possible to combine these fields at the ORM level to get

$program->all_streams ==  ["1stream","2stream","3stream","4stream"]

Answer 1

https://laravel.com/docs/5.6/eloquent-mutators
In fact, as I understand it, you need an Accessor.
In the model you create it and in the function you can "shrink" the array as you need.