pub fn map<I: 'static, O: 'static>(
parser: ParserHandle,
f: impl FnMut(I) -> O + Send + Sync + 'static,
) -> ParserHandle
pub fn map<I: 'static, O: 'static>(
parser: ParserHandle,
f: impl FnMut(I) -> O + Send + Sync + 'static,
) -> ParserHandle