code: public static <T> Set<T> getRandomSubsetMin(Set<T> set, int minCount) {
  		int count = RandomUtils.randomIntBetween(minCount, set.size());
  		return getRandomSubset(set, count);
  	}
docs: Generates a random subset of <code>set</code>, that contains at least
  <code>maxCount</code> elements.
  
  @param <T>
  Type of set elements
  @param set
  Basic set for operation
  @param minCount
  Minimum number of items
  @return A subset with at least <code>minCount</code> elements