import re


def check_google_calendar_id(google_cal_id):
    """utility to verify a google calendar id passed as a parameter. 
    
    Args:
        google_cal_id (str): string of the google calendar id
    
    Returns:
        bool: True if the string in parameter is a verified google calendar id, else returns False 
    """
    return bool(
        re.match(r"esi\.dz_[a-z0-9]{26}@group\.calendar\.google\.com",
                 google_cal_id))