syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"self.field_indices().get(id).cloned().expect(\"no"}]}
source_snippet:         self.field_indices().get(id).cloned().expect("no index for a field")
context_before:     pub fn field_index(&self, id: HirId) -> FieldIdx {
context_after:     }