Checks that the provided data is a dataframe and that it has all the expected columns based on the content group identifier
See also
Other checks:
check_content_group_id(),
check_data_content(),
check_jurisdiction_code(),
check_mcn(),
check_state_fips_code(),
check_submission(),
check_submitter_email(),
check_submitter_name(),
check_submitter_title()