@Override
        public boolean test(String name) {
            return name.equals(SIGV4A);
        }
Returns if a given auth scheme is equivalent to {@code aws.auth#sigv4a}.

@param authScheme name of the auth scheme.
@return whether the auth scheme is equivalent to {@code aws.auth#sigv4a}.
smithy-aws-endpoints/src/main/java/software/amazon/smithy/rulesengine/aws/language/functions/EndpointAuthUtils.java