Macro hobo_css::box_sizing

macro_rules! box_sizing {
    css_macros::easy_enum! {box-sizing content-box border-box} => { ... };
    css_macros::easy_enum! {box-sizing content-box border-box} => { ... };
    css_macros::easy_enum! {box-sizing content-box border-box} => { ... };
    css_macros::easy_enum! {box-sizing content-box border-box} => { ... };
    css_macros::easy_enum! {box-sizing content-box border-box} => { ... };
}