GetCaveatContext returns the entered caveat caveat, if any.

InjectRequestID adds the value of the --request-id flag to the context of the given command.

ParseCaveatContext parses the given context JSON string into caveat context, if valid.

ParseSubject parses the given subject string into its namespace, object ID and relation, if valid.

ParseType parses a type reference of the form `namespace#relaion`.

PrettyProto returns the given protocol buffer formatted into pretty text.

ReadSchema calls read schema for the client and returns the schema found.

ErrExhaustedRelationships signals that the last producible value of a RelationshipParser has already been consumed.

RelationshipParser is a closure that can produce relationships.