— Function: defgroup symbol members doc [keyword value]...

Declare symbol as a customization group containing members. symbol does not need to be quoted.

doc is the group documentation.

members should be an alist of the form ((name widget)...) where name is a symbol and widget is a widget for editing that symbol. Useful widgets are custom-variable for editing variables, custom-face for editing faces, and custom-group for editing groups.

Internally, custom uses the symbol property custom-group to keep track of the group members, and group-documentation for the documentation string.

The following additional keyword's are defined:

:prefix

value should be a string. If the string is a prefix for the name of a member of the group, that prefix will be ignored when creating a tag for that member.