Dart APIunself_local_database unself_local_database library Null safety Classes $CollectionTable $FieldTable Collection CollectionCompanion CollectionDao CollectionData CollectionOrm<D> DocumentDao Field FieldCompanion FieldData ListConverter<T> LocalDatabase LocalDatabase description MapConverter<T> Extensions CollectionFromDomain CollectionToOrm FieldFromDomain FieldToOrm Functions connect() → DatabaseConnection unself_local_database unself_local_database library unself_local_database package Libraries unself_local_database unself_local_database library Classes $CollectionTable $FieldTable Collection CollectionCompanion CollectionDao CollectionData CollectionOrm DocumentDao Field FieldCompanion FieldData ListConverter LocalDatabase MapConverter Extensions CollectionFromDomain CollectionToOrm FieldFromDomain FieldToOrm Functions connect