syntax_data: {"ast_node_type":"function","tokens":[{"end":70,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn add_drop(&mut self, data: DropData, next: DropIdx) -> DropIdx {
context_before:     /// that node's index is returned. Otherwise, the new node's index is returned.
context_after:         let drop_nodes = &mut self.drop_nodes;