Some code I have some issue.

[liangxiwei]

hello I am learn the slate project and read the source code.It's a great project to me!
And I have some issue to some code.
file:path.ts ->relative method

......
relative(path: Path, ancestor: Path): Path {
    if (!Path.isAncestor(ancestor, path) && !Path.equals(path, ancestor)) {
      throw new Error(
        `Cannot get the relative path of [${path}] inside ancestor [${ancestor}], because it is not above or equal to the path.`
      )
    }

    return path.slice(ancestor.length) //Can I return ancestor direct??
  },

previous(path: Path): Path {
    if (path.length === 0) {
      throw new Error(
        `Cannot get the previous path of a root path [${path}], because it has no previous index.`
      )
    }
    const last = path[path.length - 1]
    if (last <= 0) {
      throw new Error(
        `Cannot get the previous path of a first child path [${path}] because it would result in a negative index.`
      )
    }
    return path.slice(0, -1).concat(last - 1) //use concat can create array inside(maybe?),Can I use push method insteadof it?
  },

[liangxiwei]

send failed

[MikeRalphson]

Are you sure you have the right project? None of slatedocs/slate is written in Typescript.

[liangxiwei]

I am sorry,my fault.