code: function _copyRule(originRule, targetRule) {
    const newRule = targetRule.cloneBefore();
    originRule.before(newRule);
    return newRule;
  }
docs: Private: copies rule from one location to another.
  Used to copy rules from root that match inherit value in a PostCSS AtRule.
  Rule copied before the rule that contains the inherit declaration.
  
  * `originRule` {Object} PostCSS Rule (in the atRule) that contains inherit declaration
  * `targetRule` {Object} PostCSS Rule (in root) that matches inherit property
  
  Returns copied {Object} PostCSS Rule.