Function create_ir_node_tree 

pub fn create_ir_node_tree(
    tree: &mut InstanceTree,
    node: &IRNode,
    parent_id: Option<NodeId>,
    state: &Value,
    patches: &mut Vec<Patch>,
    is_root: bool,
    dependencies: &mut DependencyGraph,
) -> NodeId

Create a tree from an IRNode (supports ForEach, When/If, and regular elements)