docs: def filter_pyfqn(cls, value, relative_to=0):
          """
          Returns Python form of fully qualified name.
  
          Args:
              relative_to: If greater 0, the returned path is relative to the first n directories.
          """
  
          def collect_packages(element, packages):
              parent = element.eContainer()
              if parent:
                  collect_packages(parent, packages)
              packages.append(element.name)
  
          packages = []
          collect_packages(value, packages)
  
          if relative_to < 0 or relative_to > len(packages):
              raise ValueError('relative_to not in range of number of packages')
  
          fqn = '.'.join(packages[relative_to:])
  
          if relative_to:
              fqn = '.' + fqn
  
          return cls.module_path_map.get(fqn, fqn)