它有什么作用 ？ （PHP特质）

Question

I just found this code and I have got no idea how to google it. :-)

What does the last trait do ? I cannot understand it's syntax. If those lines between the curly braces would be parameters for a new instance, shouldn't it be between parentheses?

<?php

namespace Laravel\Dusk;

use Closure;
use BadMethodCallException;
use Illuminate\Support\Str;
use Illuminate\Support\Traits\Macroable;
use Facebook\WebDriver\WebDriverDimension;

class Browser
{
    use Concerns\InteractsWithAuthentication,
        Concerns\InteractsWithCookies,
        Concerns\InteractsWithElements,
        Concerns\InteractsWithJavascript,
        Concerns\InteractsWithMouse,
        Concerns\MakesAssertions,
        Concerns\WaitsForElements,
        Macroable {
            __call as macroCall;
        }

    // ...

}

The code is from Laravel\Dusk. Here is the original GitHub repository and the Class itself

Answer 1

This:

namespace Laravel\Dusk;

use Illuminate\Support\Traits\Macroable;

class Browser
{
    use Macroable {
       __call as macroCall;
    }

    public function __call($method, $parameters)
    {
        // this is defined in THIS class
    }
}

Just aliases the __call method from Macroable trait and makes it available as

$this->macroCall($method, $parameters)

This is needed to avoid the conflict of the __call method which is defined in both this class and the imported trait