signal Regress.FooObject::signal def callback(foo_object, object, p0, user_param1, ...) <code>foo_object</code>

instance of that is emitting the signal

 <code>object</code> <code>p0</code> <code>user_param1</code>

first user parameter (if any) specified with the connect() method

<code>...</code>

additional user parameters (if any)

 <code>Returns</code>