Function followPath

followPath(from, ...path): Element | undefined
Walk through a path into an XML (or similar) document.

Note that tag names must be unique. If you have an element like
```
  <parent>
    <twin />
    <twin />
    <unique />
  </parent>
```
and you say followPath(parent, "twin") the result will be undefined because we don't know which twin to return. followPath(parent, "unique") will return the last child element.
Parameters
- from: undefined | Element
  Start from this element.
- Rest...path: readonly (string | number)[]
  A list of instructions, like 0 to take the first child element or a string to look for an element with that tag name.
Returns Element | undefined
The requested Element, or undefined if there were any problems.
- Defined in misc.ts:130