Enums.SelectionMode enumeration

The SelectionMode can be one of:

Constant	Description
`Enums.SelectionModeAdd`	`(0)` Adds features to the current selection set.
`Enums.SelectionModeNew`	`(1)` Creates a new selection.
`Enums.SelectionModeSubtract`	`(2)` Removes features from the current selection set.