Function cssparser::parse_one_rule

pub fn parse_one_rule<'i, 't, R, P, E>(
    input: &mut Parser<'i, 't>, 
    parser: &mut P
) -> Result<R, ParseError<'i, E>> where
    P: QualifiedRuleParser<'i, QualifiedRule = R, Error = E> + AtRuleParser<'i, AtRule = R, Error = E>, 

Parse a single rule, such as for CSSOM’s CSSStyleSheet.insertRule.