code: @Nonnull
    public static String getWithTrailing (@Nullable final String sSrc, @Nonnegative final int nMinLen, final char cEnd)
    {
      return _getWithLeadingOrTrailing (sSrc, nMinLen, cEnd, false);
    }
docs: Get a string that is filled at the end with the passed character until the
  minimum length is reached. If the input string is empty, the result is a
  string with the provided len only consisting of the passed characters. If the
  input String is longer than the provided length, it is returned unchanged.
  
  @param sSrc
  Source string. May be <code>null</code>.
  @param nMinLen
  Minimum length. Should be &gt; 0.
  @param cEnd
  The character to be used at the end
  @return A non-<code>null</code> string that has at least nLen chars