code: def _flattenComponent(glyphSet, component):
      
  
      glyph = glyphSet[component.baseGlyph]
      if not glyph.components:
          transformation = Transform(*component.transformation)
          return [(component.baseGlyph, transformation)]
  
      all_flattened_components = []
      for nested in glyph.components:
          flattened_components = _flattenComponent(glyphSet, nested)
          for i, (_, tr) in enumerate(flattened_components):
              tr = tr.transform(component.transformation)
              flattened_components[i] = (flattened_components[i][0], tr)
          all_flattened_components.extend(flattened_components)
      return all_flattened_components
docs: Returns a list of tuples (baseGlyph, transform) of nested component.