:dir:`py:method` directive, except that the resulting markup marks the
generated signature a signal.
+To reference such a signal, use the equally named role :role:`pyqt4:signal`:
+ Reference a signal documented with :dir:`pyqt4:signal`
Though the ``pyqt4`` domain is derived from the Python domain and can thus
work as drop-in replacement for it, you should not use this directive as
default domain, unless you are documenting a project consisting solely of