dbus-introspect-get-signaturedbus-introspect-get-signature is a compiled Lisp function in `
dbus.el'. (dbus-introspect-get-signature BUS SERVICE PATH INTERFACE NAME &optional DIRECTION) Return signature of a `method' or `signal', represented by NAME, as string. If NAME is a `method', DIRECTION can be either "in" or "out". If DIRECTION is `nil', "in" is assumed. If NAME is a `signal', and DIRECTION is non-`nil', DIRECTION must be "out".