import re


def camelback2snake(camel_dict: dict):
    """Convert the passed dictionary's keys from camelBack case to snake_case."""
    converted_obj = {}
    for key in camel_dict.keys():
        converted_key = re.sub(r'[A-Z]', lambda x: '_' + x.group(0).lower(), key)
        converted_obj[converted_key] = camel_dict[key]
    return converted_obj