Allow optional variadic arguments for methods/functions #1124

Job	Run time
Test with embed	2m 30s
Build with ZTS	1m 45s
Build and Test (ubuntu-latest, 8.0, stable, 17, nts)	3m 16s
Build and Test (ubuntu-latest, 8.0, nightly, 17, nts)	3m 29s
Build and Test (ubuntu-latest, 8.1, stable, 17, nts)	4m 57s
Build and Test (ubuntu-latest, 8.1, nightly, 17, nts)	3m 42s
Build and Test (ubuntu-latest, 8.2, stable, 17, nts)	4m 42s
Build and Test (ubuntu-latest, 8.2, nightly, 17, nts)	3m 38s
Build and Test (ubuntu-latest, 8.3, stable, 17, nts)	3m 19s
Build and Test (ubuntu-latest, 8.3, nightly, 17, nts)	3m 29s
Build and Test (macos-latest, 8.0, stable, 15, nts)	3m 11s
Build and Test (macos-latest, 8.0, nightly, 15, nts)	2m 56s
Build and Test (macos-latest, 8.1, stable, 15, nts)	3m 0s
Build and Test (macos-latest, 8.1, nightly, 15, nts)	2m 53s
Build and Test (macos-latest, 8.2, stable, 15, nts)	3m 9s
Build and Test (macos-latest, 8.2, nightly, 15, nts)	2m 53s
Build and Test (macos-latest, 8.3, stable, 15, nts)	3m 0s
Build and Test (macos-latest, 8.3, nightly, 15, nts)	2m 50s
Build and Test (windows-latest, 8.0, nightly, 17, ts)	4m 40s
Build and Test (windows-latest, 8.0, nightly, 17, nts)	4m 57s
Build and Test (windows-latest, 8.1, nightly, 17, ts)	5m 24s
Build and Test (windows-latest, 8.1, nightly, 17, nts)	5m 29s
Build and Test (windows-latest, 8.2, nightly, 17, ts)	5m 47s
Build and Test (windows-latest, 8.2, nightly, 17, nts)	5m 14s
Build and Test (windows-latest, 8.3, nightly, 17, ts)	5m 9s
Build and Test (windows-latest, 8.3, nightly, 17, nts)	5m 16s
	1h 40m 35s

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