Class Group
Groups are a generic way of categorizing users to apply permissions, or some other label, to those users. A user can belong to any number of groups.
Declaration
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A user in a group automatically has all the permissions granted to that
group. For example, if the group 'Site editors' has the permission
can_edit_home_page, any user in that group will have that permission.
Beyond permissions, groups are a convenient way to categorize users to
apply some label, or extended functionality, to them. For example, you
could create a group 'Special users', and you could write code that would
do special things to those users -- such as giving them access to a
members-only portion of your site, or sending them members-only email
messages.
Methods