code: @Nonnull
    public String getAsString (@Nonnegative final int nLength)
    {
      ValueEnforcer.isBetweenInclusive (nLength, "Length", 0, m_nCount);
      return new String (m_aBuf, 0, nLength);
    }
docs: Converts input data to a string.
  
  @param nLength
  The number of characters to convert. Must be &le; than
  {@link #getSize()}.
  @return the string.