%  \definebar[hiddenbar][underbar][continue=yes,left=\zwj,right=\zwj,empty=yes]

\starttext

\input ward \hiddenbar               {\color[red]{invisible}}
\input ward \hiddenbar          {\quad\color[red]{invisible}\quad}
\input ward \hiddenbar{\quad\quad\quad\color[red]{invisible}\quad\quad\quad}
\input ward \hiddenbar               {\color[red]{invisible}\quad\quad\quad\quad\quad\quad}
\input ward

\definebar
  [widehiddenbar]
  [hiddenbar]
  [left={\quads[3]},
   right={\quads[3]}]

\input ward \widehiddenbar{invisible} \input ward

\stoptext
