def is_valid_smb_hidden_files(smb_hidden_files):
    """
    Validates smbhiddenfiles NAS volume parameter.  String should be forward
    slash (/) delimited.

    :type smb_hidden_files: str
    :param smb_hidden_files: The smbhiddenfiles parameter to be validated.

    :rtype: bool
    :return: True or False depending on whether smb_hidden_files passes
        validation.
    """
    if smb_hidden_files is None:
        return False
    if not smb_hidden_files.startswith('/') or not smb_hidden_files.endswith(
        '/'):
        return False
    return True
