rangeUntil

Declare a breakpoint range that applies between a lower-bound breakpoint (inclusive) and an upper-bound breakpoint (exclusive).

For example, styles declared with (SM ..< LG) { ... } will appear for tablets through desktops but not for mobile devices nor wide screens; styles declared with (ZERO ..< SM) { ... } will only apply to mobile devices.

Note: Within a StyleScope, (ZERO ..< SM) { ... } reads OK, but we would probably recommend until(SM) { ... } in this case.