View file vendor/laravel/framework/src/Illuminate/Foundation/Events/Dispatchable.php

<?php

namespace Illuminate\Foundation\Events;

trait Dispatchable
{
    /**
     * Dispatch the event with the given arguments.
     *
     * @return void
     */
    public static function dispatch()
    {
        return event(new static(...func_get_args()));
    }

    /**
     * Dispatch the event with the given arguments if the given truth test passes.
     *
     * @param  bool  $boolean
     * @param  mixed  ...$arguments
     * @return void
     */
    public static function dispatchIf($boolean, ...$arguments)
    {
        if ($boolean) {
            return event(new static(...$arguments));
        }
    }

    /**
     * Dispatch the event with the given arguments unless the given truth test passes.
     *
     * @param  bool  $boolean
     * @param  mixed  ...$arguments
     * @return void
     */
    public static function dispatchUnless($boolean, ...$arguments)
    {
        if (! $boolean) {
            return event(new static(...$arguments));
        }
    }

    /**
     * Broadcast the event with the given arguments.
     *
     * @return \Illuminate\Broadcasting\PendingBroadcast
     */
    public static function broadcast()
    {
        return broadcast(new static(...func_get_args()));
    }
}