syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"Some(Cow::from(get_until_newline(src,"}]}
source_snippet:             Some(Cow::from(get_until_newline(src, begin)))
context_before:         if let Some(ref src) = self.src {
context_after:         } else {