code: function createFieldRequest(columnName, position) {
  
      if (util.isNaN(position) || position <= 0) {
          throw new TypeError('Position should be a number which is higher than one!');
      }
  
      var xw = createXMLWriter();
  
      xw = xw.startElement('gs:cell')
          .writeAttribute('row', 1)
          .writeAttribute('col', position)
          .writeAttribute('inputValue', columnName)
          .endElement();
  
      return xw.endElement().toString();
  }
docs: Creates the 'create column' request payload
  
  @param columnName
  @param position
  
  @returns {*}