       if Decoration.isType(properties, 'line-number')
         @lineNumberDecorationsByScreenRow[row] ?= {}
         @lineNumberDecorationsByScreenRow[row][decorationId] = properties
-
-      else if Decoration.isType(properties, 'gutter')
-        gutterName = properties.gutterName
-        @customGutterDecorationsByGutterNameAndScreenRow[gutterName] ?= {}
-        @customGutterDecorationsByGutterNameAndScreenRow[gutterName][row] ?= {}
-        @customGutterDecorationsByGutterNameAndScreenRow[gutterName][row][decorationId] = {properties, screenRange}
 
     return
 

    @characterWidthsByScope = {}
    @lineDecorationsByScreenRow = {}
    @lineNumberDecorationsByScreenRow = {}
    @customGutterDecorationsByGutterNameAndScreenRow = {}
    @screenRowsToMeasure = []
    @transferMeasurementsToModel()
    @transferMeasurementsFromModel()

  updateLineDecorations: ->
    @lineDecorationsByScreenRow = {}
    @lineNumberDecorationsByScreenRow = {}
    @customGutterDecorationsByGutterName = {}

    for decorationId, decorationState of @decorations
      {properties, screenRange, rangeIsReversed} = decorationState
      if Decoration.isType(properties, 'line') or Decoration.isType(properties, 'line-number')
        @addToLineDecorationCaches(decorationId, properties, screenRange, rangeIsReversed)

      else if Decoration.isType(properties, 'gutter') and properties.gutterName?
        @customGutterDecorationsByGutterName[properties.gutterName] ?= {}
        @customGutterDecorationsByGutterName[properties.gutterName][decorationId] = decorationState

    return

