static PhoneCallOperator noOp() {
        return new PhoneCallOperator() {
            @Override
            public boolean canCall() {
                return false;
            }
        };
    }
No op phone call operator.

@return the phone call operator
core/cas-server-core-notifications-api/src/main/java/org/apereo/cas/notifications/call/PhoneCallOperator.java