text: # Tests:
  #   importstmt ::= LOAD_CONST LOAD_CONST import_as
  #   import_as ::= IMPORT_NAME designator
  
  #   Since Python 3.3:
  #     classdef ::= buildclass designator
  #     designator ::= STORE_NAME
  #     buildclass ::= LOAD_BUILD_CLASS mkfunc LOAD_CONST expr CALL_FUNCTION_3
  #     mkfunc ::= LOAD_CONST LOAD_CONST MAKE_FUNCTION_0
  
  import io
  class BZ2File(io.BufferedIOBase):
      pass
  
  
  class ABC(metaclass=BZ2File):
      pass
  