code: def allEqual(lst, mapper=None):
      if not lst:
          return True
      it = iter(lst)
      try:
          first = next(it)
      except StopIteration:
          return True
      return allEqualTo(first, it, mapper=mapper)
  
imports: from fontTools.misc.roundTools import noRound
  from .errors import VariationModelError
label_desc: Use image node_id 4 for calling a global function with example usage: allEqual(lst, mapper) and returns: allEqualTo, True, True