Implement some flow blocks

[evren-okcu]

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[github-actions]

⚠️ CI failed

Platform	Name	Status	Details
All	Formatting	✅	Details
Linux	Build library	✅	Details
Linux	Build binaries	✅	Details
Linux	Build tests	✅	Details
Linux	Build examples	✅	Details
Linux	Run tests	✅	Details
Linux	Run doctests	❌	Details

[github-actions]

⚠️ CI failed

Platform	Name	Status	Details
All	Formatting	✅	Details
Linux	Build library	✅	Details
Linux	Build binaries	✅	Details
Linux	Build tests	✅	Details
Linux	Build examples	✅	Details
Linux	Run tests	❌	Details
Linux	Run doctests	⏩	Details

[github-actions]

⚠️ CI failed

Platform	Name	Status	Details
All	Formatting	✅	Details
Linux	Build library	✅	Details
Linux	Build binaries	✅	Details
Linux	Build tests	✅	Details
Linux	Build examples	✅	Details
Linux	Run tests	❌	Details
Linux	Run doctests	⏩	Details

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