get_feature_group
Description:
Returns the group the given feature and idx belong to.
f the feature or index do not exist in this, -1 is returned.
Parameters:
| this |
a `GdkDevicePad` |
| feature |
the feature type to get the group from |
| feature_idx |
the index of the feature to get the group from |
Returns:
|
The group number of the queried pad feature. |