nl_tokens: if there is only one nested ruleset and that one has no path then it is just fake ruleset
pl_tokens: function hasFakeRuleset ( atRuleNode ) { var bodyRules = atRuleNode . <mask> ; return bodyRules . length === 1 && ( ! bodyRules [ 0 ] . paths || bodyRules [ 0 ] . paths . length === 0 ) ; }