syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"self.heads.iter().map(|(k,"}]}
source_snippet:         self.heads.iter().map(|(k, v)| (*k, *v))
context_before:     fn iter(&self) -> impl Iterator<Item = (StackDepth, AllPathsToHeadCoinductive)> + '_ {
context_after:     }