56-duplicate-contacts.cls

public Boolean duplicateContacts(Contact c1, Contact c2) {
    if (c1.Email != null && c2.Email != null && c1.Email == c2.Email) {
        return true;
    }
    if (c1.Phone != null && c2.Phone != null && c1.Phone == c2.Phone) {
        return true;
    }
    return false;
}