code: def _qualified_key(self, key):
          
          fq_key = super(Reader, self)._qualified_key(key)
          return fq_key.lstrip('/')
docs: Prepends the configured prefix to the key (if applicable).
  
          For Consul we also lstrip any '/' chars from the prefixed key.
  
          :param key: The unprefixed key.
          :return: The key with any configured prefix prepended.