Decorating is the process of adding methods to classes that are not part of the core
interface (Gamma et al. 1994). Use listDecorators to see which decorators are currently
available. The primary use-cases are to add numeric results when analytic ones are missing,
to add complex modelling functions and to impute missing d/p/q/r functions.
References
Gamma, Erich, Richard Helm, Ralph Johnson, and John Vlissides. 1994. <U+201C>Design Patterns: Elements
of Reusable Object-Oriented Software.<U+201D> Addison-Wesley.