read method
reads from storage according to LocalValue.basePath
and LocalValue.documentType
.
returns null if nothing is at that path, T if otherwise.
It is possible to put a path in id
(i.e. read('my/path/${user.id}')
),
but is not recommended because subsequent lookups will need to be pathed the same. instead, put
path segments when constructing this LocalValue.
Implementation
Future<T?> read(String id) {
return super.readValue(id);
}