docs: def migrate(belstr: str) -> str:
      """Migrate BEL 1 to 2.0.0
  
      Args:
          bel: BEL 1
  
      Returns:
          bel: BEL 2
      """
  
      bo.ast = bel.lang.partialparse.get_ast_obj(belstr, "2.0.0")
  
      return migrate_ast(bo.ast).to_string()