#fixed code
                              public AttributeBuilder nodeAttributes(String groupId, String artifactId, String version, String scopes, String effectiveScope) {
    AbstractNode node = this.scopeStyles.containsKey(effectiveScope) ? this.scopeStyles.get(effectiveScope) : this.defaultNode;
    return node.createAttributes(groupId, artifactId, version, scopes, node != this.defaultNode);
  }
#vulnerable code 
                              public AttributeBuilder nodeAttributes(String groupId, String artifactId, String version, String scopes, String effectiveScope) {
    Map<String, ? extends AbstractNode> scopedNodes = getScopedNodes();
    AbstractNode node = scopedNodes.containsKey(effectiveScope) ? scopedNodes.get(effectiveScope) : getDefaultNode();
    return node.createAttributes(groupId, artifactId, version, scopes, node != this.defaultNode && node != EMPTY_NODE);
  } 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE