[TwigBridge] Added missing form() function
merged branch bschussek/twig-fix (PR #7797)

This PR was merged into the master branch.

Discussion
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[TwigBridge] Added missing form() function

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | n/a

Commits
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045fed6 [TwigBridge] Added missing form() function