Sourceror.Comments.extract_comments

You're seeing just the function extract_comments, go back to Sourceror.Comments module for more information.
Link to this function

extract_comments(quoted)

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Specs

extract_comments(Macro.t()) :: {Macro.t(), [map()]}

Does the opposite of merge_comments, it extracts the comments from the quoted expression and returns both as a {quoted, comments} tuple.