class_docstr: A scalar with different values at different points in the designspace.
code: def default(self):
      self.fix_all_locations()
      key = Location({ax.axisTag: ax.defaultValue for ax in self.axes})
      if key not in self.values:
          raise ValueError("Default value could not be found")
          # I *guess* we could interpolate one, but I don't know how.
      return self.values[key]
  
file_path: catboost/contrib/python/fonttools/fontTools/feaLib/variableScalar.py
imports: from fontTools.varLib.models import VariationModel, normalizeValue, piecewiseLinearMap
label_desc: Use image node_id 9 for calling the VariableScalar obj's underlying member method code with example usage: obj.default() and returns: self