How to control the position of the nodes during the axpend process and the collapsed for the cilldren of node that is collapsed and the nodes that from both sides to the node that was clicked on

### Describe the bug / 问题描述

I am using indented layout and i want to control the collapse and expand behavior for the nodes position, like i want when the user clicked the collapse button the nodes from both sides not change the x and y position until I chang it by my condition, and the children position for the nodes that will be expand...

### Reproduction link / 重现链接

Nothing

### Steps to Reproduce the Bug or Issue / 重现步骤

Nothing

### G6 Version / G6 版本

🆕 5.x

### Operating System / 操作系统

Windows

### Browser / 浏览器

Chrome, Edge, Firefox

### Additional context / 补充说明

Test

The issue names G6's indented layout and version 5.x but provides no reproduction, files, tests, or entry point. Start by locating the indented-layout collapse and expand API, then clarify the expected x/y behavior for neighboring and child nodes. Done requires a reproducible case and an agreed, testable position outcome.

Written by the indexing model from the issue text.