text: 
  from typing import Optional
  from .fixed_resolver import FixedPassphraseResolver, Passphrase, PassphraseContext
  
  class EmptyPassphraseResolver(FixedPassphraseResolver):
    passphrase_scheme: Optional[str] = "empty"
    allow_bare_passphrase_scheme: bool = True
  
    def __init__(self, base_context: Optional[PassphraseContext]=None):
      super().__init__(base_context)
      self._base_context['fixed_passphrase'] = ""
  