syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"self.span_to_source(sp,"}]}
source_snippet:         self.span_to_source(sp, |src, start_index, _| {
context_before:     pub fn indentation_before(&self, sp: Span) -> Option<String> {
context_after:             let before = &src[..start_index];