string builder

src/mol-base/collections/iterator.ts

src/mol-base/utils/_spec/string-builder.spec.ts

src/mol-base/utils/string-builder.ts

src/mol-data/structure/model/properties/hierarchy.ts

src/mol-data/structure/query/properties.ts

src/mol-data/structure/structure/atom.ts

src/mol-data/structure/structure/structure.ts

src/mol-io/writer/cif/TODO

src/perf-tests/string-builder.ts