Flutter widget for treeview selection

widget should: consist of a treeview/listview combination display a drop-down of possible sources by name auto-select first as default retrieve the json construct a treeview based on the hierarchy allow selection of any node with an ID upon selection of a node, add an entry to a listview to represent that node nodes should be deletable from the listview, which should also deselect/uncheck from the treeview ( pref batch operations ) nodes in the listview that are overridden by a lower selection should be greyed in the treeview/listview to indicate this eg: node 1a is selected - this automatically overrides any higher nodes on the 1a branch when the user selects a different source, any items that are currently selected should be maintained *if their id exists in the new source* sample data is attached. deliverable will be the code for the widget, embedded in a sample app.. future customisations are likely and will be negotiated separately.

Project ID: 34220112