 module.exports =
   ColumnMapping: ColumnMapping
   ColumnTransformer: ColumnTransformer
+  CopyFromOriginalTransformer: CopyFromOriginalTransformer
+  RemoveColumnsTransformer: RemoveColumnsTransformer
   ColumnGenerator: ColumnGenerator
   Mapping: Mapping
   defaultColumnMappers: [
     ColumnTransformer,
+    CopyFromOriginalTransformer,
+    RemoveColumnsTransformer
     ColumnGenerator
   ]

    Q(accRow)

  columnName: () ->
    @_toCol

  priority: () ->
    @_priority or 2000

  @supports: (options) -> util.abstractMethod() # boolean - whether options are supported

  map: (origRow, accRow) -> util.abstractMethod() # mapped row promice
  transformHeader: (headerAccumulator, originalHeader) -> util.abstractMethod() # array of string with the new updated header
  priority: () -> util.abstractMethod() # int

  _initValueTransformers: (transformers, transformerConfig) ->
