@Override
    public byte getOrder() {
        // This is a desired behavior from CFN, so set it near the end
        // while still having room for other overrides if necessary.
        return 124;
    }
CloudFormation issues a warning in its build tooling every time it detects
an "object" type in the converted JSON Schema's definitions that doesn't set
"additionalProperties" to "false". This mapper sets that to reduce the
warnings customers receive when developing resources from automatically
generated resource schemas.

@see <a href="https://github.com/aws-cloudformation/cloudformation-cli/blob/8491ac54d12028a7e00295b39f102e3786e52ccf/src/rpdk/core/data_loaders.py#L286-L295">Warning in CFN CLI</a>
smithy-aws-cloudformation/src/main/java/software/amazon/smithy/aws/cloudformation/schema/fromsmithy/mappers/AdditionalPropertiesMapper.java