pub fn parse_css_declaration<'a>(
unparsed_css_key: &'a str,
unparsed_css_value: &'a str,
location: (ErrorLocation, ErrorLocation),
css_key_map: &CssKeyMap,
warnings: &mut Vec<CssParseWarnMsg<'a>>,
declarations: &mut Vec<CssDeclaration>,
) -> Result<(), CssParseErrorInner<'a>>