public DataTree getDataTree() {
		return tree;
	}
Get the data tree node that is selected

@param provider the provider with which to construct the new context 
@param e mouse event for the popup; may be null if this is being called as a result of 
       the key binding pressed
@return the new context; null if there is no selection
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/datatree/ProjectDataTreePanel.java