public Set<Port> getExposedPorts() {
    return (exposedPorts == null) ? ImmutableSet.of() : Ports.parse(exposedPorts);
  }
Returns set of {@link Port} representing ports to be exposed on container (if specified).

@return set of exposed ports
jib-cli/src/main/java/com/google/cloud/tools/jib/cli/CommonContainerConfigCliOptions.java