title: How to select all checkboxes in a column?
body: <p>Does anyone know how to select(check) all the check boxes in column of handsontable by checking the first check box of a particular column. I tried all the possible options to get it done but I,m not able to do it by any means. </p>
  
  <p>Here is the code,</p>
  
  <pre><code>  function getCarData() {
      return [
        { available: true,available2: true,available3: true, comesInBlack: 'yes'},
        {available: false,available2: true,available3: true,available3: true, comesInBlack: 'yes'},
        { available: true,available2: true,available3: true, comesInBlack: 'no'},
        {available: false,available2: true,available3: true, comesInBlack: 'yes'},
        { available: false,available2: true,available3: true, comesInBlack: 'no'}
      ];
    }
  
    var example1 = document.getElementById('example1'),
      hot1;
  
    hot1 = new Handsontable(example1, {
      data: getCarData(),
      colHeaders: ['Available','Available2','Available3'],
      columns: [
  
        {
          data: 'available',
          type: 'checkbox'
        },{
          data: 'available2',
          type: 'checkbox'
        },{
          data: 'available3',
          type: 'checkbox'
        }
      ]
    });
  </code></pre>