183 attempt to reduce cognitive complexity in datanodes

[Marvin-Brouwer]

Pull request for #183

Reducing cognitive complexity in the parsing code.

Definition Of Done

• [x] Meets acceptance criteria of story / Fixed bug
• [x] Added new tests
• [x] Checked quality gate results
• [x] Checked stryker report for score regression
• [x] Checked performance profiles for regression
• [x] Updated documentation
• [x] Updated release notes

[Marvin-Brouwer]

There seems to be the slightest performance degradation, that's good enough for now.