Method addPositionable

src/LGraphCanvas.ts:3675–3678

(item: Positionable)

    this.onSelectionChange?.(this.selected_nodes)

    function addPositionable(item: Positionable): void {
      if (!item.selected || !selectedItems.has(item)) notSelected.push(item)
      else isSelected.add(item)
    }
  }

  /**