syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if path_from_head == Self::cycle_path_kind(&self.stack, step_kind_from_parent, head) {
context_before:             // highest cycle head to the goal is the same.
context_after:                 Self::update_parent_goal(