syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"print_indented!(self,"}]}
source_snippet:                 print_indented!(self, "subpatterns: [", depth_lvl + 2);
context_before:                 print_indented!(self, "Leaf { ", depth_lvl + 1);
context_after:                 for field_pat in subpatterns.iter() {