code: function(key, defaultValue){
      var c = getCache(this.ns)
  
      if(arguments.length === 0) {
        return c
      }
  
      return c[key] !== undefined ? c[key] : defaultValue
    }
docs: getter
  
  @param  {Object} key
  @param  {Object} defaultValue
  @return {Object} value corresponding to key or all values if no key provided