Hello,
I was wondering if it was possible to group multiple items in a UniqueValueRenderer into one item. In the item documentation (Item—ArcGIS Pro | Documentation) it notes that the values is a read only field, and when I try to add an item with multiple values, the group does not get added.
Below is the format I am currently using to add 2 values to the "Counties" group. The 'Pickaway' value will show up, but the grouped one will not.
CountySymbology.renderer.addValues({"Counties": ['Pickaway', 'Wood;Trumbull']})
If this is not possible, is there a way to update the default label from the <all other values> text?