how to create function in model laravel code example

Example 1: laravel find query

foreach (Flight::where('foo', 'bar')->cursor() as $flight) {
    //
}

Example 2: laravel find query

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Flight extends Model
{
    /**
     * The connection name for the model.
     *
     * @var string
     */
    protected $connection = 'connection-name';
}