std::iter::Chain<std::iter::Map<std::iter::Filter<std::vec::IntoIter<blockworx_doc::rev::Rev>, {closure@src/store/prefix.rs:99:17: 99:22}>, {closure@src/store/prefix.rs:100:14: 100:19}>, std::iter::Map<std::iter::Filter<impl Iterator<Item = (blockworx_doc::rev::Rev, &[std::string::String])>, {closure@src/store/prefix.rs:103:17: 103:30}>, {closure@src/store/prefix.rs:104:14: 104:27}>>