feat: add missing helper fns #5660

Job	Run time
check no_std	45s
clippy	1m 43s
docs	56s
doctest	2m 31s
feature-checks	2m 35s
fmt	13s
wasm-unknown	2m 29s
test ubuntu-latest stable --no-default-features	2m 25s
wasm-wasi	2m 28s
test ubuntu-latest stable	2m 27s
test ubuntu-latest stable --all-features	2m 29s
test ubuntu-latest nightly --no-default-features	1m 8s
test ubuntu-latest nightly	1m 31s
test ubuntu-latest nightly --all-features	2m 2s
test ubuntu-latest 1.81 --no-default-features	1m 39s
test ubuntu-latest 1.81	1m 42s
test windows-latest stable --no-default-features	2m 22s
test windows-latest stable	2m 21s
test windows-latest stable --all-features	2m 23s
test windows-latest nightly --no-default-features	2m 23s
test windows-latest nightly	2m 21s
test windows-latest nightly --all-features	2m 22s
test windows-latest 1.81 --no-default-features	2m 17s
test windows-latest 1.81	2m 14s
deny / cargo deny check	26s
ci success	3s
	48m 15s

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