public void setApiGatewayDefaults(ApiGatewayDefaults apiGatewayDefaults) {
        this.apiGatewayDefaults = apiGatewayDefaults;
    }
Sets the additional allowed CORS headers.

@param additionalAllowedCorsHeaders additional cors headers to be allowed.
smithy-aws-apigateway-openapi/src/main/java/software/amazon/smithy/aws/apigateway/openapi/ApiGatewayConfig.java