Convert an object to a lazy expression or lazy dots.
Display a call (or expression) as a tree.
Automatically name all components of a lazy dots.
Find common environment in list of lazy objects.
Find the expression associated with an argument
Make a promise explicit by converting into a formula.
Build a named list from the LHS of formulas
Turn RHS of formula into a string/label.
Capture expression for later lazy evaluation.
Capture ... (dots) for later lazy evaluation.
Make a call with 'lazy_dots' as arguments.