Convert SessionManager to use a closure.

Closes #3420215

added 1 commit

• beeaf5fb - Fix PHPCS.

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added 1 commit

• a4ec7d1f - Autowire session handler service.

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added 127 commits

• a4ec7d1f...16b96ada - 123 commits from branch project:11.x
• 88da39fe - Convert SessionManager to use a closure.
• 9c179cce - Fix PHPCS.
• 1a97a836 - Autowire session handler service.
• 2ee2edc3 - Fix rebase.

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closed