code: function parseEra(data) {
  		// some runtimes (like Mozilla Rhino) does not preserves
  		// key order so we have to sort values manually
  		return Object.keys(data.eras).sort(function(a, b) {
  			return parseInt(a.substr(1)) - parseInt(b.substr(1));
  		});
  	}
docs: Parses era data from Can I Use raw database
  @param  {Object} data
  @return {Array}