@Override
    public String toString() {
        return toString(this, anyOriginSupported, shortCircuit, policies);
    }
Returns the policy for the specified {@code origin}.

@return {@link CorsPolicy} which allows the {@code origin},
        {@code null} if the {@code origin} is {@code null} or not allowed in any policy.
core/src/main/java/com/linecorp/armeria/server/cors/CorsConfig.java