zipper -is:module -package:nonempty-zipper -package:zipper-extra package:uniplate

Create a zipper, focused on the top-left value.

Zipper structure, whose root type is the first type argument, and whose focus type is the second type argument.

Create a zipper with a different focus type from the outer type. Will return Nothing if there are no instances of the focus type within the original value.

From a zipper take the whole structure, including any modifications.