Generate UUIDs (v4, v7) for unique identifiers in applications.
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123e4567-e89b-12d3-a456-426614174000
018e0d54-d957-7ee6-9e7a-7e6a7c7b7c7d
Generate multiple UUIDs at once
A: v4 is random, v7 is time-based (lexicographically sortable).
A: Statistically unique with negligible collision probability.
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