Added doc comments
minor#8823 [Security] [2.2] Added doc comments and missing use statement (piotrantosik)

This PR was merged into the 2.2 branch.

Discussion
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[Security] [2.2] Added doc comments and missing use statement

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

Commits
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7ee39a6 Added doc comments