core/src/main/java/org/apache/sling/cms/core/internal/jobs/OptimizeFilesJob.java [58:66]:
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    private void collectFiles(Resource root, List<File> files) {
        for (Resource child : root.getChildren()) {
            if (CMSConstants.NT_FILE.equals(child.getResourceType())) {
                files.add(child.adaptTo(File.class));
            } else {
                collectFiles(child, files);
            }
        }
    }
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core/src/main/java/org/apache/sling/cms/core/internal/jobs/FileMetadataExtractorJob.java [61:69]:
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    private void collectFiles(Resource root, List<File> files) {
        for (Resource child : root.getChildren()) {
            if (CMSConstants.NT_FILE.equals(child.getResourceType())) {
                files.add(child.adaptTo(File.class));
            } else {
                collectFiles(child, files);
            }
        }
    }
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