public List<URL> getOverrideConfigFileLocations() {
        return overrideConfigFileLocations;
    }
Remove duplicates from the provided list, while preserving the order of the elements in this list. We do this
manually instead of using a LinkedHashSet for the override URLs, because the set would invoke the URL's equals method.
URL's equals method requires a DNS query, which is not desired.
aws-java-sdk-core/src/main/java/com/amazonaws/internal/config/InternalConfig.java