public void addDirect(FileEntry layerEntry) {
    direct.add(
        new FileTemplate(
            layerEntry.getSourceFile().toAbsolutePath().toString(),
            layerEntry.getExtractionPath().toString()));
  }
Add a layer entry as a "direct" sync entry. Direct entries can be sync'd to a running container
without rebuilding any files.

@param layerEntry the layer entry to add to the direct configuration
jib-plugins-common/src/main/java/com/google/cloud/tools/jib/plugins/common/SkaffoldSyncMapTemplate.java