aws-amplify-app/src/main/java/software/amazon/amplify/app/UpdateHandler.java [55:75]:
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                    })
                    .progress()
            )
            .then(progress -> new ReadHandler().handleRequest(proxy, request, callbackContext, proxyClient, logger));
    }

    private void updateTags(final AmazonWebServicesClientProxy proxy,
                            final ProxyClient<AmplifyClient> proxyClient,
                            final ResourceModel model,
                            final Map<String, String> desiredTags) {
        logger.log("INFO: Modifying Tags");
        final Set<Tag> finalTags = convertResourceTagsToSet(desiredTags);
        final Set<Tag> existingTags = getExistingTags(proxy, proxyClient, model);

        final Set<Tag> tagsToRemove = Sets.difference(existingTags, finalTags);
        final Set<Tag> tagsToAdd = Sets.difference(finalTags, existingTags);

        if (tagsToRemove.size() > 0) {
            Collection<String> tagKeys = tagsToRemove.stream().map(Tag::getKey).collect(Collectors.toSet());
            final UntagResourceRequest untagResourceRequest = UntagResourceRequest.builder().resourceArn(model.getArn())
                    .tagKeys(tagKeys).build();
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aws-amplify-branch/src/main/java/software/amazon/amplify/branch/UpdateHandler.java [55:75]:
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                    })
                    .progress()
            )
            .then(progress -> new ReadHandler().handleRequest(proxy, request, callbackContext, proxyClient, logger));
    }

    private void updateTags(final AmazonWebServicesClientProxy proxy,
                            final ProxyClient<AmplifyClient> proxyClient,
                            final ResourceModel model,
                            final Map<String, String> desiredTags) {
        logger.log("INFO: Modifying Tags");
        final Set<Tag> finalTags = convertResourceTagsToSet(desiredTags);
        final Set<Tag> existingTags = getExistingTags(proxy, proxyClient, model);

        final Set<Tag> tagsToRemove = Sets.difference(existingTags, finalTags);
        final Set<Tag> tagsToAdd = Sets.difference(finalTags, existingTags);

        if (tagsToRemove.size() > 0) {
            Collection<String> tagKeys = tagsToRemove.stream().map(Tag::getKey).collect(Collectors.toSet());
            final UntagResourceRequest untagResourceRequest = UntagResourceRequest.builder().resourceArn(model.getArn())
                    .tagKeys(tagKeys).build();
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