class_docstr: ExtensionDtype that may be backed by more than one implementation.
class_docstr_tok: ["ExtensionDtype","that","may","be","backed","by","more","than","one","implementation","."]
code: def __repr__(self) -> str:
      return f"{self.name}[{self.storage}]"
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING, Any, TypeVar, cast, overload
  import numpy
  from pandas._libs import missing
  from pandas._libs.hashtable import object_hash
  from pandas._libs.properties import cache_readonly
  from pandas.errors import AbstractMethodError
  from pandas.core.dtypes.generic import ABCDataFrame, ABCIndex, ABCSeries
label_desc: Use image node_id 2 for calling the StorageExtensionDtype obj's underlying member method code with example usage: obj.__repr__() and returns: self, str, self, str