arg2='wal\'do',sender='foo',type='signal',interface='bar.x',
arg2='wal\'do2',sender='foo',type='signal',interface='bar.x',
arg3='test',sender='foo',type='signal',interface='bar.x',
arg3='test',sender='foo',type='method_call',interface='bar.x',

interface='quux.x'
interface='bar.x'
member='waldo',path='/foo/bar'
path='/foo/bar'
path_namespace='/foo'
path_namespace='/foo/quux'
arg1='two'
member='waldo',arg2path='/prefix/'
member=waldo,path='/foo/bar',arg3namespace='prefix'
arg4has='pi'
arg4has='pa'
arg4has='po'
arg4='pi'