@Override
  @VisibleForTesting
  public int hashCode() {
    return Objects.hash(
        platforms,
        creationTime,
        entrypoint,
        programArguments,
        environmentMap,
        exposedPorts,
        labels,
        user,
        workingDirectory);
  }
Constructs a builder for a {@link ContainerConfiguration}.

@return the builder
jib-core/src/main/java/com/google/cloud/tools/jib/configuration/ContainerConfiguration.java