public Builder addVolumes(@Nullable Set<AbsoluteUnixPath> volumes) {
      if (volumes != null) {
        volumesBuilder.addAll(ImmutableSet.copyOf(volumes));
      }
      return this;
    }
Adds items to the "Volumes" field in the container configuration.

@param volumes the directories to create volumes
@return this
jib-core/src/main/java/com/google/cloud/tools/jib/image/Image.java