def __init__(self, telegram_specification, apply_checksum_validation=True):
self.telegram_specification = telegram_specification<EOL>self.apply_checksum_validation = apply_checksum_validation<EOL>
:param telegram_specification: determines how the telegram is parsed
:param apply_checksum_validation: validate checksum if applicable for
    telegram DSMR version (v4 and up).
:type telegram_specification: dict