@classmethod
def __width(cls, header):
    """ provides width of tine property

        :param header: tine frameHeader
        :type header: :obj:`dict` <:obj:`str`, `any`>
        :returns: numpy dtype
        :rtype: :obj:`str`
        """
    width = 0
    if 'aoiWidth' in header and header['aoiWidth'] > 0:
        width = header['aoiWidth']
    elif 'sourceWidth' in header:
        width = header['sourceWidth']
    if not 0 < width <= 65535:
        raise ValueError('Invalid width: %s' % width)
    return width
