Recommended API for tree-view to allow custom nodes.

atom_tree-view_custom_nodes

myCallbackFunc: (node) =>
        node.on "click", =>
                #do something
        node.on "delete", =>
                #do something else


atom.project.tree-view().addNode
        text: "node text" #text to be displayed
        class: "my-special-node"  #optional, adds extra class but a class is added for each package as well
        parentNode: parentNode #optional if you are making a sub node
        callback: myCallbackFunc #required, calls back with details to update and subscribe to events on that node
        
atom.project.tree-view().removeNode
        node: nodeID
        force: false #fail removal of the node if it has children