PHP: Example of extend Data class

Tried as I may, I just can’t get it to work.
Here is my code:

use backendless\Backendless;
use backendless\model\BackendlessUser;
use backendless\model\Data;
use backendless\services\persistence\BackendlessDataQuery;
class myTable extends Data {
                      public function  __construct() {
$jsc = new myTable();
$jsc->setJob_description( "xxx");

I get error on $jsc->setJob_description( “xxx”);
I do have a field named ‘job_description’

What is happening? HELP!!!

Try it with lower-case “j”, the name of the getter/setter must literally match the property: “setjob_description”