Add @mixin tag

[ycs77]

I hope you can add @mixin tag so that class can mixin other class methods hints.

My use time is to call SecondClass in the __call method on FirstClass.

Use example:

/**
 * @mixin SecondClass
 */
class FirstClass
{
    //
}

Can this be achieved?

[0xstride]

Is there any plans for this?

[tianyiw2013]

I think it's a good suggestion.

[besrabasant]

Aboslutely... When can we expect this feature to be added?

[StevenRoan]

We also need this feature. To support the laravel resource situation. Or do we have any workaround?

[dvsoukup]

Seems like slightly old thread but... I saw this PR:
#135

Looks like it just has a failing test. I too would like these doc tags added.

[neild3r]

This was implemented