php-language-server/fixtures/completion/constant_with_namespace.php

<?php

namespace HELLO {

    /**
     * Does something really cool!
     */
    function world() {

    }

    \HE
}

namespace {

    /**
     * Lorem ipsum dolor sit amet.
     *
     * @var bool
     */
    define('HELLO', true);

    HELLO\world();
}