code: @Nullable
    public static ICommonsList <String> getAllFileLines (@Nullable final File aFile, @Nonnull final Charset aCharset)
    {
      return aFile == null ? null : StreamHelper.readStreamLines (FileHelper.getInputStream (aFile), aCharset);
    }
docs: Get the content of the passed file as a list of lines, whereas each line
  does not contain a separator.
  
  @param aFile
  The file to read. May be <code>null</code>.
  @param aCharset
  The character set to use. May not be <code>null</code>.
  @return <code>null</code> if the file does not exist, the content
  otherwise.