import EDU.neu.ccs.demeter.dj.*; import EDU.neu.ccs.demeter.*; public class Labeled_vertex extends Any_vertex { public Ident label_name; public Vertex class_name; public Labeled_vertex() {} public Labeled_vertex(Ident label_name, Vertex class_name) { this.label_name = label_name; this.class_name = class_name; } }