       
                    &lt;optional><br>
                

                
                </td>
            

            
                <td class="default">
                
                </td>
            

            <td class="description last">An object containing fields for 
overwriting request headers. For example: { "Content-Type": "image/png" }.</td>
        </tr>

    

        <tr>
            
                <td class="name"><code>post_data</code></td>
            

            <td 