CKeditor sub-numbered list plugin

Question

Is anyone aware, if there is a plugin for creating the following list style:

1. First item
    1.1 Sub item
    1.2 Second sub-item
2. Second item
    2.1 Sub
    2.2 More sub

Essential is that sub-item gets compound number formatting, like 1.2, 2.6 etc.

Answer 1

As I didn't find one, and nobody answers, I asume there is none, at list in public access.