Navigate from a node to its 1st sibling, rewinding the zipper to the head of
the focus forest. If the node is the only one in the forest or the focus is
already at the head, the zipper is returned unchanged.
See end for the opposite navigation: jumping to the end of the
focus forest.
This is like head except it will remain on the same tree level.
Navigate from a node to its 1st sibling, rewinding the zipper to the head of the focus forest. If the node is the only one in the forest or the focus is already at the head, the zipper is returned unchanged.
See end for the opposite navigation: jumping to the end of the focus forest.
This is like head except it will remain on the same tree level.