Function create_tree_recursive 

fn create_tree_recursive(
    result: &mut RenderTree,
    plan: &dyn ExecutionPlan,
    x: usize,
    y: usize,
) -> usize

Recursively builds the render tree structure. Traverses the execution plan and creates corresponding render nodes while maintaining proper positioning and parent-child relationships.

Arguments

• result - The render tree being constructed
• plan - Current execution plan node being processed
• x - Horizontal position in the tree
• y - Vertical position in the tree

Returns

• The width of the subtree rooted at the current node