code: @Nullable
    @ReturnsMutableCopy
    public static ICommonsList <String> readStreamLines (@Nullable final IHasInputStream aISP,
                                                         @Nonnull final Charset aCharset)
    {
      return readStreamLines (aISP, aCharset, 0, CGlobal.ILLEGAL_UINT);
    }
docs: Get the content of the passed Spring resource as one big string in the passed
  character set.
  
  @param aISP
  The resource to read. May not be <code>null</code>.
  @param aCharset
  The character set to use. May not be <code>null</code>.
  @return <code>null</code> if the resolved input stream is <code>null</code> ,
  the content otherwise.