Variable duration

duration: Omit<{ 100: internal.StyleObject<{}>; 1000: internal.StyleObject<{}>; 150: internal.StyleObject<{}>; 200: internal.StyleObject<{}>; 300: internal.StyleObject<{}>; 500: internal.StyleObject<{}>; 700: internal.StyleObject<{}>; 75: internal.StyleObject<{}>; DEFAULT: internal.StyleObject<{}> }, "DEFAULT"> & internal.StyleObjectBase & { css: internal.CSSObject | internal.CSSMap; meta: internal.UtilityMeta }