Function assembly_xml::common::exact::expect_child_or_end

pub fn expect_child_or_end<'a, B: BufRead>(
    start_key: &'static str,
    end_key: &'static str,
    reader: &mut Reader<B>,
    buf: &'a mut Vec<u8>
) -> Result<Option<BytesStart<'a>>>

Expect an