stagfe2/app/Models/BillingReport.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Relations\HasOne;
use Illuminate\Support\Collection;

# use Illuminate\Database\Eloquent\Model;

class BillingReport extends Model
{
    protected $table = 'billing_report';

    public function clientDisplayName()
    {
        return $this->client_last . ', ' . $this->client_first;
    }

    public function proDisplayName()
    {
        return $this->pro_last . ', ' . $this->pro_first;
    }

    public function note()
    {
        return $this->hasOne(Note::class, 'id', 'note_id');
    }

    public function client()
    {
        return $this->hasOne(Client::class, 'id', 'client_id');
    }

}