{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"//"}]}
    // region is actually a "gap" region, so make sure it's unset.
    // Coverage mappings use the high bit of `end_col` to indicate that a
    let end_col_has_high_bit_unset = (end_col & (1 << 31)) == 0;