code: protected void registerCachedFilesWithPlan(Plan p) throws IOException {
  		for (Tuple2<String, DistributedCacheEntry> entry : cacheFile) {
  			p.registerCachedFile(entry.f0, entry.f1);
  		}
  	}
docs: Registers all files that were registered at this execution environment's cache registry of the
  given plan's cache registry.
  
  @param p The plan to register files at.
  @throws IOException Thrown if checks for existence and sanity fail.