Revert the AST copy as some users were relying on Check to be mutable#890

Merged

TristonianJones merged 1 commit intogoogle:masterfrom TristonianJones:revert-checker-concurrency

Jan 25, 2024

+3-2

Commits on Jan 25, 2024

Revert the AST copy as some users were relying on Check to be mutable
TristonianJones
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