build

Use leading underscore for private objects #120

Job	Run time
Test debug build on Ubuntu --warning-as-error --debug --multi-phase-init	57s
Test debug build on Ubuntu --warning-as-error --debug	48s
Test on pypy-3.9	26s
Test on pypy-3.10	22s
Test on pypy-3.11	34s
Test on ubuntu-latest x64 --warning-as-error --multi-phase-init	41s
Test on ubuntu-latest x64 --warning-as-error	39s
Test on macos-latest x64 --warning-as-error --cffi	55s
Test on macos-latest x64 --warning-as-error	51s
Test on macos-latest x64 --warning-as-error --multi-phase-init	50s
Test on ubuntu-latest x64 --warning-as-error --cffi	42s
Test on windows-latest x64 --warning-as-error --multi-phase-init	1m 10s
Test on windows-latest x86 --warning-as-error	1m 26s
Test on windows-latest x86 --warning-as-error --multi-phase-init	1m 20s
Test on windows-latest x86 --warning-as-error --cffi	1m 38s
Test on windows-latest x64 --warning-as-error	1m 3s
Test on windows-latest x64 --warning-as-error --cffi	1m 9s
Build sdist	0s
Build wheels for ${{ matrix.arch }} (skip ${{ matrix.skip_image }})	0s
Build wheels on ${{ matrix.platform }}	0s
Publish to PyPI	0s
	15m 31s

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