syntax_data: {"ast_node_type":"function","tokens":[{"end":76,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn span_wrapped_by_angle_or_parentheses(&self, span: Span) -> bool {
context_before:     /// return true if wrapped by '<>' or '()'
context_after:         self.span_to_source(span, |src, start_index, end_index| {