||A boolean variable object.
||A FileInsertion object has an
insert method that takes
a template string and returns the value resulting from replacing filename
insertion commands with the contents of the file.
||A utility class to add statements to a model (supplied to its constructor)
from a template string of the form `subject.predicate=object`.
||Static methods for setup or other preparation (at least initially just for
declaring the Eyeball assemblers).