{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"///"}]}
    /// This forms a linked list that can be traversed to find all enclosing loops.
    /// For each node, the loop header node of its nearest enclosing loop.
    enclosing_loop_header: IndexVec<BasicCoverageBlock, Option<BasicCoverageBlock>>,