Your search +path:_op +path:. +path:data +path:. +path:send_initial_metadata +path:. +path:maybe_compression_level +path:. +path:is_set did not match any files.
Suggestions:

• Make sure all terms are spelled correctly.
• Try different keywords.
• Try more general keywords.
• Use 'wil*' cards if you are looking for partial match.