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node_modules/stylelint/lib/utils/uniteSets.mjs

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+/**
+ * Unite two or more sets
+ *
+ * @param {Iterable<string>[]} args
+ * @see {@link https://github.com/microsoft/TypeScript/issues/57228|GitHub}
+ */
+export default function uniteSets(...args) {
+	return new Set([...args].reduce((result, set) => [...result, ...set], []));
+}