@Deprecated
  public JibContainerDescription describeContainer() {
    return new JibContainerDescription(layerConfigurations);
  }
Describes the container contents and configuration without actually physically building a
container.

@deprecated use {@link #toContainerBuildPlan}.
@return a description of the container being built
jib-core/src/main/java/com/google/cloud/tools/jib/api/JibContainerBuilder.java