BuildResource parses input strings, typically from CLI flags, to build a Resource object for use in the protobuf API.

GRPCError generates a gRPC error code, as defined in google.golang.org/grpc/status.

ValidDestinations specifies resource types allowed as a destination: destination resource on an outbound 'to' query target resource on an outbound 'from' query.

ValidTargets specifies resource types allowed as a target: target resource on an inbound query target resource on an outbound 'to' query destination resource on an outbound 'from' query.