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Tailwind CSS class: .space-y-px

    <div class="flex flex-col space-y-px bg-gray-300 m-2 w-40">
        <div class="bg-teal-400 h-6 w-6"></div>
        <div class="bg-teal-400 h-6 w-6"></div>
        <div class="bg-teal-400 h-6 w-6"></div>
    </div>

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