syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"self.span_extend_while(span,"}]}
source_snippet:         self.span_extend_while(span, char::is_whitespace).unwrap_or(span)
context_before:     pub fn span_extend_while_whitespace(&self, span: Span) -> Span {
context_after:     }