Composites pass self instead of children and starting nodes #489

Job	Run time
pyiron / commit-updated-env	8s
pyiron / build-docs	3m 35s
pyiron / benchmark-tests	3m 1s
pyiron / build-notebooks	3m 32s
pyiron / black	8s
pyiron / pip-check	2m 57s
pyiron / unit-tests (ubuntu-latest, 3.11)	1m 51s
pyiron / unit-tests (ubuntu-latest, 3.10)	1m 44s
pyiron / unit-tests (windows-latest, 3.11)	1m 48s
pyiron / unit-tests (macos-11, 3.11)	1m 57s
pyiron / coveralls-and-codacy / Tests-and-Coverage	1m 53s
	22m 34s

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