Refactor _missing_addresses_before() #1291

Job	Run time
Shellcheck	4s
Prepare	54s
Dependency	4s
Ruff check and force	5s
Check commit	33s
format('Run pytest using Python {0}', matrix.python-version)	0s
format('Create pytest cache for Python {0}', matrix.python-version)	-1s
Run mypy	0s
Process test coverage	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	0s
Process test complexity	0s
	1m 39s

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