# File gstreamer/sample/gst-inspect.rb, line 34
def print_prop(name, obj)
    s = (name) ? name.concat(":").ljust(15) : ""
    if obj.is_a?(Array)
        puts s + "List:"
        prefix { obj.each { |obj| print_prop(nil, obj) } } 
    else
        puts s + obj.class.to_s + ": " + obj.to_s
    end
end