 
   "mapper/1d/categorical_mapper",
   "mapper/1d/linear_mapper",
+  "mapper/1d/log_mapper"
   "mapper/2d/grid_mapper",
   "mapper/color/linear_color_mapper",
 


    Glyph:                    'renderer/glyph/glyph_factory'
    LinearAxis:               'renderer/guide/linear_axis'
    CategoricalAxis:          'renderer/guide/categorical_axis'
    DatetimeAxis:             'renderer/guide/datetime_axis'
    Grid:                     'renderer/guide/grid'

  "renderer/guide/datetime_axis",
  "renderer/guide/grid",
  "renderer/guide/linear_axis",
  "renderer/guide/log_axis",
  "renderer/overlay/box_selection",

  "source/column_data_source",
