This package contains more arcane manipulation of objects, packets, and groups
in NoFlo. Core packages like
noflo-groups should not depend on other packages so this package is created
to contain graphs that depend on multiple packages.
Take in an object, extract some value by key and group that with another value of the object.
GROUPING: The key of the value to be used for the group
ENCLOSED: The key of the value to be grouped
OUT: The enclosed value grouped by the grouping value