comefrom: <gouthampradhan>hashing_NumberOfAtoms_1.java
code: private Map<String, Integer> merge(Map<String, Integer> left, Map<String, Integer> right) {
      for (String k : left.keySet()) {
        if (right.containsKey(k)) {
          right.put(k, right.get(k) + left.get(k));
        } else right.put(k, left.get(k));
      }
      return right;
    }
masked: private Map < String , Integer > var_2 ( Map < String , Integer > var_4 , Map < String , Integer > var_5 ) {
    for ( String var_7 : var_4 . keySet ( ) ) {
      if ( var_5 . containsKey ( var_7 ) ) {
        var_5 . put ( var_7 , var_5 . get ( var_7 ) + var_4 . get ( var_7 ) ) ;
      }
      else var_5 . put ( var_7 , var_4 . get ( var_7 ) ) ;
    }
    return var_5 ;
  }
  