Constructs a new instance of group permissions with role-based access control.
What role can send messages in the chat.
What role can invite other handles.
What role can kick other handles.
What role can ban other handles.
What role can change the group's name.
What role can change the group's description.
What role can change the group's avatar.
What role can delete anyone's messages.
Permissions of certain group functions and capabilities. Each capability requires a minimum GroupRole for handles to be able to execute.