code: function insert (table, object, fields) {
    var input = this
  
    if (input instanceof Array) {
      insertArray.call(input, table, object, fields)
    } else {
      insertObject.call(input, table, object, fields)
    }
  }
docs: Default renderer.insert function, `this` bound to the input.
  @param  {Table} table       cli-table
  @param  {Object} object     renderer object
  @param  {Array} fields      fields to show