This separates the functionallity to read the definition from the
definition itself. This is needed to have both responisibilities
separated so it's easier to work with and test.

Change-Id: Id0dd9c17852a8b7479e9d01d4c1726e915d3dc6e
Reviewed-on: https://gerrit.libreoffice.org/68681
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>