Merge branch '3510-regulation-is_regulating-should-be-a-property' into 'master'
Resolve "regulation is_regulating should be a property"
Closes #3510 (closed)
See merge request !4937 (merged)
(cherry picked from commit 6c2d6beb)
214ad1d5 fix is_regulating missing parenthesis
Closes #784 (closed)