[flexcoders] Re: bytearray.readObject doesn't convert my objects back

[flexaustin]

Getting error 
1144: Interface method readExternal in namespace flash.utils:IExternalizable is 
implemented with an incompatible signature


public class Data extends EventDispatcher implements IExternalizable

        public function writeExternal(output:IDataOutput) {
                        output.writeObject(_nodes);
                        output.writeObject(_edges);
                        output.writeObject(_span);
                        output.writeObject(_groups);
                        output.writeObject(_root);
                        output.writeObject(_tree);
                }
                public function readExternal(input:IDataInput) {
                        _nodes = input.readObject();
                        _edges = input.readObject();
                        _span = input.readObject();
                        _groups = input.readObject();
                        _root = input.readObject();
                        _tree = input.readObject();
                }