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JQuery, how to combine child selectors?

I have some HTML like the below, and would like to write a javascript function that returns an object composed of all the .header and span elements. The below javascript works, but is there a way to combine the headers into a single jQuery selector?

<li>
    <div class=".header">
        <span>some stuff</span>
    </div>
</li>
_getElements: function() {
    var temp =  $('> li > .header', this.element);
    var temp2 = $('> li > .header > span', this.element);
    var temp3 = temp.add(temp2);
    return temp3;
},

You could just use a comma to select multiple things:

$('> li > .header, > li > .header > span', this.element);

BTW, i've never seen anyone use the direct child selector ( > ) like that, at the beginning of an expression. Does it work?

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