Make a function to undo full-width if needed at subsequent breakpoints?

[robweychert]

If you use the full-widthfunction on an object at a certain breakpoint but don’t want it to be full width at later breakpoints, you have to override the width, margin-left, and margin-right values generated by full-width. Since full-width is a mixin, the code it generates isn’t immediately apparent, and you might not know what values need to be overridden. Should there be a function that zeros out those values?