Merge branch 'feature/remove-const-qualifiers-in-return-by-value' into 'master'

Oliver Sanderrequested to merge
cherry-pick-362072de into releases/2.6

Fix compiler warning due to const qualifier in return by value

See merge request !91 (merged)

(cherry picked from commit 362072de)

a9bd8954 Fix compiler warning due to const qualifier in return by value

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