collapseItem<K> static method

List<TreeNode<K>> collapseItem<K>(List<TreeNode<K>> nodes, K target)

Collapses a node by its item value.

Parameters:

• nodes (List<TreeNode<K>>, required): Tree nodes.
• target (K, required): Item value to collapse.

Returns: List<TreeNode<K>> — tree with item collapsed.

Implementation

static List<TreeNode<K>> collapseItem<K>(List<TreeNode<K>> nodes, K target) {
  return replaceNodes(nodes, (node) {
    if (node is TreeItemNode<K> && node.data == target) {
      return node.updateState(expanded: false);
    }
    return null;
  });
}