docs: def exists(self, path=None, client_kwargs=None, assume_exists=None):
          """
          Return True if path refers to an existing path.
  
          Args:
              path (str): Path or URL.
              client_kwargs (dict): Client arguments.
              assume_exists (bool or None): This value define the value to return
                  in the case there is no enough permission to determinate the
                  existing status of the file. If set to None, the permission
                  exception is reraised (Default behavior). if set to True or
                  False, return this value.
  
          Returns:
              bool: True if exists.
          """
          try:
              self.head(path, client_kwargs)
          except ObjectNotFoundError:
              return False
          except ObjectPermissionError:
              if assume_exists is None:
                  raise
              return assume_exists
          return True