\section save_function save_function - save the definition of a function to the users autoload directory

\subsection save_function-synopsis Synopsis
 <tt>save_function FUNCTION_NAME</tt>

\subsection save_function-description Description

save_function is used to save the current definition of a function to
a file which will be autoloaded by current and future fish
sessions. This can be useful if you have interactively created a new
function and wish to save it for later use.