"An alist mapping the names to layout functions.
An element of this alist is either in the following forms:
-(NAME CONFIGURE-FUNCTION [PARAMETERS])
-(NAME1 . NAME2)
+\(NAME CONFIGURE-FUNCTION [PARAMETERS]\)
+\(NAME1 . NAME2\)
In the first form, NAME is a string which specifies the layout
setting, and CONFIGURE-FUNCTION is a function which does window