fix(transformer/class-properties): do not insert an empty iterator to insert_many_before

[Dunqing]

Insert an empty iterator which will cause panic after #9063

[Dunqing]

• feat(transformer/statement-injector): add an assertion to check if it still contains statements that don't inject #9063
• fix(transformer/class-properties): do not insert an empty iterator to insert_many_before #9157 👈 (View in Graphite)
• main

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[codspeed-hq]

CodSpeed Performance Report

Merging #9157 will not alter performance

_{Comparing 02-16-fix_transformer_statement-injector_skip_empty_iterator (c2101ad) with main (611b029)}

Summary

✅ 33 untouched benchmarks

[overlookmotel]

Nice solution!

[overlookmotel]

Merge activity

• Feb 18, 4:42 PM EST: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Feb 18, 4:42 PM EST: A user added this pull request to the Graphite merge queue.
• Feb 18, 4:47 PM EST: A user merged this pull request with the Graphite merge queue.