[issue44654] Refactor and clean up the union type implementation

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:


New changeset a6670cdf77aab2b1ee7be0b9df060dcac2a2dc48 by Serhiy Storchaka in branch '3.10':
[3.10] bpo-44654: Do not export the union type related symbols (GH-27223). (GH-27225)
https://github.com/python/cpython/commit/a6670cdf77aab2b1ee7be0b9df060dcac2a2dc48


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<https://bugs.python.org/issue44654>
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