public static HttpMethod get(String methodStr) {
        HttpMethod method = methods.get(methodStr);
        return method != null ? method : unsupported;
    }
Gets the HttpMethod corresponding to the provided string. If no corresponding method can be found
{@link spark.route.HttpMethod#unsupported} will be returned.

@param methodStr The string containing HTTP method name
@return          The HttpMethod corresponding to the provided string
src/main/java/spark/route/HttpMethod.java