If you instantiate this now, before you gather any data, then you will write an empty array to `Ohai`'s output if there are no cronjobs for `root`. `Ohai` seems to favor not included the key in the output at all if no data is discovered. Consider using a function to gather the data and then an `unless.empty?` check before declaring the `cronjobs` array - see [autoupdates](https://github.com/rackerlabs/ohai-plugins/blob/master/plugins/autoupdates.rb#L46-L49) plugin for a simple example.