Reads a DBus signature string and converts it to java classes tree.
Uses a DBus signature string like "a(ia{sv})" and converts it something like:

java.util.List
   org.freedesktop.dbus.Struct
         java.lang.Integer
         java.util.Map
               java.lang.String
               org.freedesktop.dbus.types.Variant

Each indent step represents another step in the hierarchy.
Classes listed in the same indent level are part of the same structure (e.g. Map, Struct).

In the example above, the signature was translated to a List of Struct where the Struct has an Integer and a Map member. The Map consists of a CharSequence/String as key and a Variant as value.

Call the static main of this class with the signature which should be translated as first argument.