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   1  /** @const */
   2  var HashmapFilter =
   3  {
   4      /**
   5      * @param  {*}        attrValue Original value
   6      * @param  {!Object}  map       Hash map
   7      * @param  {boolean} strict    Whether this map is strict (values with no match are invalid)
   8      * @return {*}                  Filtered value, or FALSE if invalid
   9      */
  10      filter: function(attrValue, map, strict)
  11      {
  12          if (attrValue in map)
  13          {
  14              return map[attrValue];
  15          }
  16  
  17          return (strict) ? false : attrValue;
  18      }
  19  };