I would like to add two force line breaks in a cell. Using an answer from this question I can add one force line break. Can you help to add two line breaks using similar function like
\newcommand{\specialcell}[2][c]{%
\begin{tabular}[#1]{@{}c@{}}#2\end{tabular}}
\\as you want forcing a new line – David Carlisle Jul 19 '13 at 13:34