identifier rubyid_is_a?'>is_a?</span><span class='lparen'>(</span><span class='const'>Hash</span><span class='rparen'>)</span>
    <span class='lbrace'>{</span><span class='rbrace'>}</span><span class='period'>.</span><span class='id identifier rubyid_tap'>tap</span> <span class='kw'>do</span> <span class='op'>|</span><span class='id identifier rubyid_hash'>hash</span><span class='op'>|</span>
      <span class='id identifier rubyid_value'>value</span><span class='period'>.</span><span class='id identifier 