code: def roundDeltas(self):
      coordWidth = self.getCoordWidth()
      self.coordinates = [
          None
          if d is None
          else otRound(d)
          if coordWidth == 1
          else (otRound(d[0]), otRound(d[1]))
          for d in self.coordinates
      ]
  
imports: from fontTools.misc.fixedTools import fixedToFloat, floatToFixed, floatToFixedToStr, strToFixedToFloat, otRound
  from fontTools.misc.textTools import safeEval
  import array
  from collections import Counter, defaultdict
  import io
  import logging
  import struct
  import sys
label_desc: Use image node_id 23 for calling the TupleVariation obj's underlying member method code with example usage: obj.roundDeltas() without return types