refactor(isolated-declarations): protect internal transform methods

[DonIsaac]

Change pub fn to pub(crate) fn for all internal methods in isolated declarations. I would appreciate someone who is more familiar with this code informing me if I incorrectly privatized methods that should be public.

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[DonIsaac]

• refactor(isolated-declarations): protect internal transform methods #6723 👈
• main

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[codspeed-hq]

CodSpeed Performance Report

Merging #6723 will not alter performance

_{Comparing don/10-20-refactor_isolated-declarations_protect_internal_transform_methods (2e2b748) with main (f05a273)}

Summary

✅ 30 untouched benchmarks

[Dunqing]

Merge activity

• Oct 20, 9:58 PM EDT: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Oct 20, 9:58 PM EDT: A user added this pull request to the Graphite merge queue.
• Oct 20, 10:07 PM EDT: A user merged this pull request with the Graphite merge queue.