docstr: Returns True if this TupleVariation has any visible impact.
  
  If the result is False, the TupleVariation can be omitted from the font
  without making any visible difference.
code: def hasImpact(self):
      """Returns True if this TupleVariation has any visible impact.
  
      If the result is False, the TupleVariation can be omitted from the font
      without making any visible difference.
      """
      return any(c is not None for c 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 5 for calling the TupleVariation obj's underlying member method code with example usage: obj.hasImpact() and returns: any