def check_tuning_config(self, tuning_config):
for channel in tuning_config['<STR_LIT>']['<STR_LIT>']:<EOL><INDENT>self.check_s3_url(channel['<STR_LIT>']['<STR_LIT>']['<STR_LIT>'])<EOL><DEDENT>
Check if a tuning configuration is valid

:param tuning_config: tuning_config
:type tuning_config: dict
:return: None