code: function hashSet(key, value) {
        var data = this.__data__;
        this.size += this.has(key) ? 0 : 1;
        data[key] = (nativeCreate && value === undefined$1) ? HASH_UNDEFINED : value;
        return this;
      }
docs: Sets the hash `key` to `value`.
  
  @private
  @name set
  @memberOf Hash
  @param {string} key The key of the value to set.
  @param {*} value The value to set.
  @returns {Object} Returns the hash instance.