code: public String getLabel() {
              String label = getProperty(labelProperty);
              label = label == null ? node.getLabel() : label;
  
              if (label == null) {
                  label = getDefaultInstanceName();
                  setProperty(labelProperty, label);
              }
  
              return label;
          }
docs: Returns the label property value.
  
  @return The label text, or null if none.