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Testing framework for Java

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package org.testng.collections;

import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.Set;

public final class Sets {

  private Sets() {}

  public static  Set newHashSet() {
    return new HashSet<>();
  }

  public static  Set newHashSet(Collection c) {
    return new HashSet<>(c);
  }

  @SafeVarargs
  public static  Set newHashSet(V... a) {
    return newHashSet(Arrays.asList(a));
  }

  public static  Set newLinkedHashSet() {
    return new LinkedHashSet<>();
  }

  public static  Set newLinkedHashSet(Collection c) {
    return new LinkedHashSet<>(c);
  }
}