{
"ResourceSpecificationVersion": "1.0.0", "ResourceType": { "AWS::CloudFormation::CustomResource": { "AdditionalProperties": true, "Documentation": "http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cfn-customresource.html", "Properties": { "ServiceToken": { "Documentation": "http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cfn-customresource.html#cfn-customresource-servicetoken", "PrimitiveType": "String", "Required": true, "UpdateType": "Immutable" } } } }
}