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<?php

namespace Sabberworm\CSS\Property;

interface AtRule {
    const BLOCK_RULES = 'media/document/supports/region-style/font-feature-values';
    // Since there are more set rules than block rules, we’re whitelisting the block rules and have anything else be treated as a set rule.
    const SET_RULES = 'font-face/counter-style/page/swash/styleset/annotation'; //…and more font-specific ones (to be used inside font-feature-values)

    public function atRuleName();
    public function atRuleArgs();
    public function __toString();
}