Function parse_layout_margin_top 

pub fn parse_layout_margin_top<'a>(
    input: &'a str,
) -> Result<LayoutMarginTop, CssPixelValueParseError<'a>>

Parses a LayoutMarginTop attribute from a &str

Example

assert_eq!(parse_layout_margin_top("5px"), Ok(LayoutMarginTop { inner: PixelValue::px(5.0) }));