Redefining latex macro using same name

Question

Currently I use a \\mytodo macro, which just calls \\todo[inline]:

\\newcommand{\\pbtodo}[1]{\\todo[inline]{#1}}

Answer 1

I often see advice on the web along the lines of:

\let\Oldtodo\todo
\renewcommand{\todo}[1]{\Oldtodo[inline]{#1}}

for this situation. I believe that \let is a plain TeX feature.