def METHOD_NAME(self, fp, headers=None, cb=None, num_cb=10, torrent=False):
    """
    Retrieves a file from a Key
    :type fp: file
    :param fp: File pointer to put the data into
    :type headers: string
    :param: ignored in this subclass.
    :type cb: function
    :param cb: ignored in this subclass.
    :type cb: int
    :param num_cb: ignored in this subclass.
    """
    if self.key_type & self.KEY_STREAM_WRITABLE:
        raise BotoClientError('Stream is not readable')
    elif self.key_type & self.KEY_STREAM_READABLE:
        key_file = self.fp
    else:
        key_file = open(self.full_path, 'rb')
    try:
        shutil.copyfileobj(key_file, fp)
    finally:
        key_file.close()