frameset-session-filter-alist

frameset-session-filter-alist is a variable defined in `frameset.el'.
Its value is

((name . :never)
 (left . frameset-filter-iconified)
 (minibuffer . frameset-filter-minibuffer)
 (top . frameset-filter-iconified))

Documentation:
Minimum set of parameters to filter for live (on-session) framesets.
DO NOT MODIFY. See `frameset-filter-alist' for a full description.