public String getHeader(String name) {
        if (parentRequest.headers().get(name) == null)
            return null;
        return parentRequest.headers().get(name).get(0);
    }
Access an HTTP header in the request. Multi-value headers are not supported.

@param name the name of an HTTP header
@return the first pertinent value
container-core/src/main/java/com/yahoo/container/jdisc/HttpRequest.java