an> <span class='id identifier rubyid_return_url'>return_url</span><span class='comma'>,</span> <span class='label'>callback_method:</span> <span class='symbol'>:postMessage</span><span class='rparen'>)</span>
    <span class='id identifier rubyid_request_token'>request_token</span> <span class='op'>=</span> <span class='id identifier rubyid_consumer'>consumer</span><span class='period'>.</span><span class='id identifier rubyid_get_request_token'>get_request_token</span><span class='lparen'>(</span><span cl