syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"print_indented!(self,"}]}
source_snippet:                 print_indented!(self, "DerefPattern { ", depth_lvl + 1);
context_before:             PatKind::DerefPattern { subpattern, .. } => {
context_after:                 print_indented!(self, "subpattern:", depth_lvl + 2);