AmbReceiver is an ambiguous AST node composed of
* a list of receiver nodes. It is employed to represent a
* super-expression occurring in the receiver position of a method call.
* The disambiguation step will attempt to resolve the receiver nodes
* into a single concrete receiver node.
*/
public interface AmbReceiver extends Receiver
{
/**
* Ambiguous sub-expressions of the receiver.
* @return A list of {@link polyglot.ast.Receiver Receiver}.
*/
List