preverve dot notation without line breaks

[Alan]

I have a yml like this:

  ...
  set:
    backend.container.tag: "v1"

when I use action plugin.

it replaces to like this:

  ...
  set:
    backend.container.tag: "v1"
    backend:
      container:
        tag: "v1"

[Frank Jogeleit]

How does your property path look like? Maybe something like set["backend.container.tag"] works.