generate
Generates a fixed length call ID using the specified dictionary. Note that this function generates pseudo-random identifiers via regular java.util.Random and should not be considered as cryptographically secure. Also note that you need to use the same dictionary for CallIdVerifier, otherwise a generated call ID could be discarded or may lead to complete call rejection.
Parameters
length
of call IDs to be generated, should be positive
dictionary
to be used to generate IDs, shouldn't be empty and shouldn't contain duplicates