%must%                  Add post-assertion validations to a function to
                        define the conditions when results of a child
                        function are valid
%when%                  Add guards to a function to define the
                        conditions when a child function will execute
AbuseMethod             Dispatcher for high-level API functions
UseFunction             Primary dispatcher for functional programming
create                  API for CRUD-like operations
futile.paradigm-package
                        A framework for working in a functional
                        programming paradigm in R
