Signature, return type and hooks compared across 5 parsed releases.
7.1.0
Return type changed from array|int to WP_Comment[]|int[]|int.verified against source
4.2.0
Moved parsing to WP_Comment_Query::parse_query().from the docblock
4.1.0
Introduced 'comment<strong>in', 'comment</strong>not_in', 'post_author<strong>in', 'post_author__not_in', 'author</strong>in', 'author__not_in', 'post<strong>in', 'post</strong>not_in', 'include_unapproved', 'type<strong>in', and 'type</strong>not_in' arguments to $query_vars.from the docblock
3.1.0
Introduced.from the docblock
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Generated from the wordpress-develop 6.9.7 tag, from src/wp-includes/class-wp-comment-query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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