aws-panorama-applicationinstance/src/main/java/software/amazon/panorama/applicationinstance/UpdateHandler.java [83:102]:
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        final Set<Tag> tagsToAdd = Sets.difference(currentTags, existingTags);
        if (!tagsToAdd.isEmpty()) {
            TagResourceRequest tagResourceRequest = Translator.translateToTagResourceRequest(tagsToAdd, arn);
            try {
                proxyClient.injectCredentialsAndInvokeV2(tagResourceRequest, proxyClient.client()::tagResource);
            } catch (ValidationException e) {
                throw new CfnInvalidRequestException(e.getMessage(), e);
            }
        }

        final Set<Tag> tagsToRemove = Sets.difference(existingTags, currentTags);
        if (!tagsToRemove.isEmpty()) {
            UntagResourceRequest untagResourceRequest = Translator.translateToUntagResourceRequest(tagsToRemove, arn);
            try {
                proxyClient.injectCredentialsAndInvokeV2(untagResourceRequest, proxyClient.client()::untagResource);
            } catch (ValidationException e) {
                throw new CfnInvalidRequestException(e.getMessage(), e);
            }
        }
        return ProgressEvent.progress(currResourceModel, callbackContext);
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aws-panorama-package/src/main/java/software/amazon/panorama/package_/UpdateHandler.java [84:103]:
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        final Set<Tag> tagsToAdd = Sets.difference(currentTags, existingTags);
        if (!tagsToAdd.isEmpty()) {
            TagResourceRequest tagResourceRequest = Translator.translateToTagResourceRequest(tagsToAdd, arn);
            try {
                proxyClient.injectCredentialsAndInvokeV2(tagResourceRequest, proxyClient.client()::tagResource);
            } catch (ValidationException e) {
                throw new CfnInvalidRequestException(e.getMessage(), e);
            }
        }

        final Set<Tag> tagsToRemove = Sets.difference(existingTags, currentTags);
        if (!tagsToRemove.isEmpty()) {
            UntagResourceRequest untagResourceRequest = Translator.translateToUntagResourceRequest(tagsToRemove, arn);
            try {
                proxyClient.injectCredentialsAndInvokeV2(untagResourceRequest, proxyClient.client()::untagResource);
            } catch (ValidationException e) {
                throw new CfnInvalidRequestException(e.getMessage(), e);
            }
        }
        return ProgressEvent.progress(currResourceModel, callbackContext);
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