bundle_constr: Internal Functions
Description
These functions are not user-facing and are only exported for developer
extensions.
Usage
bundle_constr(object, situate, desc_class)situate_constr(fn)
swap_element(x, ...)
Value
The two _constr() functions are constructors that return a bundle
and a situater, respectively. swap_element() returns x after swapping
out the specified element.