 
       setModifier.to = overview[overview.length-1].createdAt[overview[overview.length-1].createdAt.length-1]
 
-      # if @newMemberBucketIndex?
       oldOverview = overview
       overview = []
       freshNewMemberBuckets = []


  @containsTimestamp = (timestamp, callback)->

    selector =
      to     : { $gte : new Date(timestamp) }
      from   : { $lte : new Date(timestamp) }

    @one selector, defaultOptions, (err, cache)-> kallback err, cache, callback


  @set
    indexes                 :
      to                    : 'unique'
      from                  : 'unique'
    sharedMethods           :
      static                : ["init", "createCacheFromEarliestTo"]
    schema                  :
