Data::Structure::Util is a toolbox to manipulate the data inside a data
structure. It can process an entire tree and perform the operation
requested on each appropriate element.

For example: It can transform all strings within a data structure to utf8
or transform any utf8 string back to the default encoding. It can remove
the blessing on any reference. It can collect all the objects or detect if
there is a circular reference.

It is written in C for decent speed.