in aws-serverless-java-container-core/src/main/java/com/amazonaws/serverless/proxy/internal/servlet/AwsCookieProcessor.java [255:258]
private boolean isInvalidLabelStartOrEnd(int prev, char current) {
return (prev == '.' || prev == -1) && (current == '.' || current == '-') ||
(prev == '-' && current == '.');
}