[Solved] Nested loop to iterate through multi-level YAML

If I have page front matter with multiple levels. My page front matter looks like this:

grids:
- template: section
  background_image: "/uploads/2018/05/01/q-mark.png"
  rows:
  - template: row
    stack-columns: tablet-s
    cols:
    - template: column
- template: section
  background_image: "/uploads/2018/05/01/q-mark.png"
  rows:
  - template: row
    stack-columns: tablet-s
    cols:
    - template: column

I can display the first-level template name for both of my grids:

{{ range .Params.grids }}
   {{ .template }}
{{ end }}

How can I return the template name of rows and cols within the loop?

Solved, solution here: https://stackoverflow.com/questions/51003102/hugo-nested-loop-to-iterate-through-multi-level-yaml