code: def _init_qualifier_decl(qualifier_decl, qual_repo):
          
          assert qualifier_decl.name not in qual_repo
          if qualifier_decl.tosubclass is None:
              qualifier_decl.tosubclass = True
          if qualifier_decl.overridable is None:
              qualifier_decl.overridable = True
          if qualifier_decl.translatable is None:
              qualifier_decl.translatable = False
docs: Initialize the flavors of a qualifier declaration if they are not
          already set.