A 'Devel::MAT' instance loads a heapdump file, and provides a container to
store analysis tools to work on it. Tools may be provided that conform to
the the Devel::MAT::Tool manpage API, which can help analyse the data and
interact with the explorer user interface by using the methods in the the
Devel::MAT::UI manpage package.

File Format
The dump file format is still under development, so at present no
guarantees are made on whether files can be loaded over mismatching
versions of 'Devel::MAT'. However, as of version 0.11 the format should
be more extensible, allowing new SV fields to be added without breaking
loading - older tools will ignore new fields and newer tools will just
load undef for fields absent in older files. As the distribution
approaches maturity the format will be made more stable.