Associates a list of string values for @key under @group_name. If @key cannot be found then it is created. If @group_name cannot be found then it is created.
a group name
a key
an array of string values
2.6
See Implementation
Associates a list of string values for @key under @group_name. If @key cannot be found then it is created. If @group_name cannot be found then it is created.