docs: @Override
      public String removeLayoutAttribute(String nodeId, String name) {
          Validate.notEmpty(nodeId, "nodeId cannot be null");
          Validate.notEmpty(name, "name cannot be null");
  
          final Map<String, String> nodeAttributes = this.layoutAttributes.get(nodeId);
          if (nodeAttributes == null) {
              return null;
          }
  
          return nodeAttributes.remove(name);
      }