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Minimal test - lines (40, 79)

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class NS_NO_VTABLE nsISupports {
 public:
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISUPPORTS_IID)

  /**
   * @name Methods
   */

  //@{
  /**
   * A run time mechanism for interface discovery.
   * @param aIID [in] A requested interface IID
   * @param aInstancePtr [out] A pointer to an interface pointer to
   * receive the result.
   * @return NS_OK if the interface is supported by the associated
   * instance, NS_NOINTERFACE if it is not.
   *
   * aInstancePtr must not be null.
   */
  NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) = 0;
  /**
   * Increases the reference count for this interface.
   * The associated instance will not be deleted unless
   * the reference count is returned to zero.
   *
   * @return The resulting reference count.
   */
  NS_IMETHOD_(MozExternalRefCountType) AddRef(void) = 0;

  /**
   * Decreases the reference count for this interface.
   * Generally, if the reference count returns to zero,
   * the associated instance is deleted.
   *
   * @return The resulting reference count.
   */
  NS_IMETHOD_(MozExternalRefCountType) Release(void) = 0;

  //@}
};