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_1 ( int [ ] var_2 ) {
    Set < Integer > var_5 = new HashSet < > ( ) ;
    for ( int var_6 : var_2 ) var_5 . add ( var_6 ) ;
    return var_5 ;
  }
  