return false;
}
if (!treeGraph().equals(node.treeGraph())) {
System.err.println("Warning: you are trying to add an arc from node " + this + " to node " + node + ", but they do not belong to the same TreeGraph!");
}
<BUG>if (!label.containsKey(arcLabel)) {
label.set(arcLabel, Generics.<TreeGraphNode>newHashSet());

}
return ((Collection) label.get(arcLabel)).add(node);
}</BUG>
public Set<TreeGraphNode> followArcToSet(Class<? extends GrammaticalRelationAnnotation> arcLabel) {

return false;
}
if (!treeGraph().equals(node.treeGraph())) {
System.err.println("Warning: you are trying to add an arc from node " + this + " to node " + node + ", but they do not belong to the same TreeGraph!");
}
Set<TreeGraphNode> collection = label.get(arcLabel);
if (collection == null) {
collection = Generics.<TreeGraphNode>newHashSet();
label.set(arcLabel, collection);
}
return collection.add(node);
}
public Set<TreeGraphNode> followArcToSet(Class<? extends GrammaticalRelationAnnotation> arcLabel) {
