       drivenQueries = driverUtil.filterMap perDatasetInfo, (info) ->
         return unless info.driven
 
-        throw new Error("this (#{condensedCommand.split.bucket}) split not implemented yet") unless info.condensedCommand.split.bucket is 'identity'
+        throw new Error("This (#{condensedCommand.split.bucket}) split not implemented yet") unless info.condensedCommand.split.bucket is 'identity'
         driverFilter = new InFilter({
           attribute: info.condensedCommand.split.attribute
           values: driverResult.map((prop) -> prop[splitName])

      splitName = condensedCommand.split.name
      if sortApplySegmentation.length is 0
        # Sorting on splitting prop
        throw new Error("not implemented yet")
      else if sortApplySegmentation.length is 1
        # Sorting on regular apply
        mainDataset = sortApplySegmentation[0].dataset



class ApplySegregator
  constructor: ->
    @byDataset = {}
    @postProcess = []
    @nameIndex = 0
