Left package:xml
The left sibling of the given location.
Siblings on the left, closest first.
Find the next left sibling that satisfies a predicate.
Insert content to the left of the current position. The new content
becomes the current position.
Insert content to the left of the current position.
Remove the current element. The new position is the one on the left.
Remove the content on the left of the current position, if any.