A 'ggproto' object for the 'ggasym' package and used by geom_asymmat()
GeomAsymmat
An object of class GeomAsymmat (inherits from GeomRect, Geom, ggproto, gg) of length 7.
GeomAsymmat is subject to change in future versions.
Use at your own risk. If dependent on GeomAsymmat,
it is advisable to include tests with a cached version to test for
equivalence.