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Code Review

This pull request integrates handwritten code for Google Cloud Bigtable, involving extensive updates to integration configurations, repository metadata, and library state. The changes include widespread import reorganization and formatting across the library, generated samples, and test suites. Review feedback highlights several issues in the integration YAML, such as a truncated replacement block, an incorrect service description, and placeholder URLs. Additionally, a bug involving an undefined variable in the noxfile.py was identified, along with a malformed HTML tag in the metadata file.