syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// would be `[102, 0, 1, 2, 3, 4]`.
context_before:     /// `seek_before_primary_effect(Location { block: 2, statement_index: 2 })`
context_after:     fn expected_state_at_target(&self, target: SeekTarget) -> DenseBitSet<usize> {