code: @Nonnull
    public static String getWithLeading (@Nullable final String sSrc, @Nonnegative final int nMinLen, final char cFront)
    {
      return _getWithLeadingOrTrailing (sSrc, nMinLen, cFront, true);
    }
docs: Get a string that is filled at the beginning 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 cFront
  The character to be used at the beginning
  @return A non-<code>null</code> string that has at least nLen chars