code: function transformer(tree, file) {
      search(tree, phrases, searcher)
  
      function searcher(match, index, parent, phrase) {
        var type = weasel
        var message
  
        if (weasels.indexOf(phrase) === -1) {
          type = fillers.indexOf(phrase) === -1 ? hedge : filler
        }
  
        message = file.warn(
          'Don’t use ' + quote(toString(match), '“', '”') + ', ' + messages[type],
          {
            start: position.start(match[0]),
            end: position.end(match[match.length - 1])
          }
        )
  
        message.ruleId = type
        message.source = 'retext-intensify'
      }
    }
docs: Search `tree` for validations.