id

Column id was added to solve cases when column does not have data index or data index is repeated on several columns.
If column id is not provided that it will be auto generated on base of column data index or random value.

Example

...
columns: [{
  type: 'string',
  title: 'Name',
  index: 'name',
  id: 'name',
  width: 80,
  align: 'center'
},{
...

Default

Auto generation