You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: ambiguous_page_object_name.rb
    path of file: ./repos/gitlabhq/rubocop/cop/qa
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require_relative '../../qa_helpers'

module RuboCop
  module Cop
    module QA
     
    
        def on_block(node)
          return unless in_qa_file?(node)
          return unless ambiguous_page?(node)

          add_offense(node.arguments.each_node(:arg).first,
                      message: MESSAGE % page_object_name(node))
        end