code: def setSupports(self, supports):
      self._model = None
      self._supports = list(supports)
      if not self._supports[0]:
          del self._supports[0]  # Drop base master support
      self._cache = {}
      self._data = None
  
imports: from fontTools.misc.roundTools import noRound, otRound
  from fontTools.misc.intTools import bit_count
  from fontTools.ttLib.tables import otTables
  from fontTools.varLib.models import supportScalar
  from fontTools.varLib.builder import buildVarRegionList, buildVarStore, buildVarRegion, buildVarData
  from functools import partial
  from collections import defaultdict
  from heapq import heappush, heappop
label_desc: Use image node_id 3 for calling the OnlineVarStoreBuilder obj's underlying member method code with example usage: obj.setSupports(supports) without return types