comefrom: <awangdev>1213. Intersection of Three Sorted Arrays_1.java
code: private Set<Integer> toSet(int[] nums) {
  
          Set<Integer> set = new HashSet<>();
          for (int num : nums) set.add(num);
          return set;
      }
masked: private Set < Integer > var_0 ( int [ ] var_1 ) {
    Set < Integer > var_2 = new HashSet < > ( ) ;
    for ( int var_3 : var_1 ) var_2 . add ( var_3 ) ;
    return var_2 ;
  }
  