code: public boolean containsFile(File f) {
  		return unchangedFiles.contains(f) || newFiles.contains(f)
  				|| updatedFiles.contains(f) || deletedFiles.contains(f)
  				|| recursedDirectories.contains(f)
  				|| failedTransfers.containsKey(f);
  	}
docs: Determine whether the operation contains a file.
  
  @param f
  @return boolean