Is that an easier way to inspect the tree elements in TreeBuilder or TableExtract?

Which name is mentioned in the code?

For example, there are online parser that you can test regex, I am curious if there is anything similar that can help debug when the element is not being retrieve as expected?

The *xpather*s help you craft xpaths you can use to retrieve the stuff you want

When the html changes significantly, you run the *xpather*s to craft new xpaths