Iterates over all the hash prefixes of a given path (excluding the full prefix itself).
Iterates over all the hash prefixes of a given path (excluding the full prefix itself).
The caller would typically test whether the returned element's sub path is empty or not, and store
an appropriate empty or partial tag in its representation. After the method returns, the
caller will typically add an entry for the full hash (s.sum), an entry which is not provided by the
iterator itself.
the path for which to calculate the prefixes
a test function whether a given hash is already stored in the caller's representation. only prefixes are provided for hashes which are not already present according to this function
an iterator over the prefixes.
A utility object implementing the prefix calculation for the randomized hash approach to storing access paths.