title: Bootstrap-table how to use exportOptions
body: <p>I want to change the filename that is used when using the Table Export extension. I know I can use the exportOptions to add {fileName:'custom_file_name'}. But I don't know where to put this.</p>
  
  <p>I tried:</p>
  
  <pre><code>data-export-options="{fileName:'custom_file_name'}"
  </code></pre>
  
  <p>and I tried to add as a method:</p>
  
  <pre><code>$('#table').bootstrapTable('exportOptions', {fileName: 'custom_file_name'})
  </code></pre>
  
  <p>But then I get an error: Uncaught Error: Unknown method: exportOptions<code>enter code here</code></p>
  
  <p>What am I missing?</p>