code: def visit(visitor, varData):
      for item in varData.Item:
          for i, v in enumerate(item):
              item[i] = visitor.scale(v)
      varData.calculateNumShorts()
  
imports: from fontTools.ttLib.ttVisitor import TTVisitor
  import fontTools.ttLib
  import fontTools.ttLib.tables.otBase
  import fontTools.ttLib.tables.otTables
  from fontTools.cffLib import VarStoreData
  import fontTools.cffLib.specializer
  from fontTools.varLib import builder
  from fontTools.misc.fixedTools import otRound
  from fontTools.ttLib.tables._g_l_y_f import VarComponentFlags
label_desc: Use image node_id 9 for calling a global function with example usage: visit(visitor, varData) without return types