ContactTriggerHelper.cls

ContactTriggerHelper.cls

public  without sharing class ContactTriggerHelper {
    //Constructor 
    public ContactTriggerHelper() {
        system.debug('Inside AccounttriggerHelper Constructor');
    }
    /**
     * @description updateContactsCountOnAccount method counts number of contacts on account records.
     * @param conList
    */
    public void updateContactsCountOnAccount(List<Contact> conList){
        //write logic to update the account owner
    }
    /**
     * @description updateAddresses method updates contact address  
     * copy billing address to contact mailling address
     * @param conList
    */
    public void updateContactAddresses(List<Contact> conList) {
        //write update contacts logic below
    }
    //Write other methods here as per your requirements

    /******************** ADD MORE METHODS*************************/
}