A cascading element is a list() with unique names whose elements
can be inherited by a child cascading_element(). The details of
cascading are handled by the cascade() and reverse_cascade()
generics.
cascading_element(..., .subclass = NULL)
| ... | Key/value pairs. Passed to |
|---|---|
| .subclass | The class to use for this cascading element |
A list with class cascading_element and any subclasses
specified by .subclass.